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Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6

Browse Source 
* 'next-spi' of git://git.secretlab.ca/git/linux-2.6: (53 commits)
  spi/omap2_mcspi: Verify TX reg is empty after TX only xfer with DMA
  spi/omap2_mcspi: disable channel after TX_ONLY transfer in PIO mode
  spi/bfin_spi: namespace local structs
  spi/bfin_spi: init early
  spi/bfin_spi: check per-transfer bits_per_word
  spi/bfin_spi: warn when CS is driven by hardware (CPHA=0)
  spi/bfin_spi: cs should be always low when a new transfer begins
  spi/bfin_spi: fix typo in comment
  spi/bfin_spi: reject unsupported SPI modes
  spi/bfin_spi: use dma_disable_irq_nosync() in irq handler
  spi/bfin_spi: combine duplicate SPI_CTL read/write logic
  spi/bfin_spi: reset ctl_reg bits when setup is run again on a device
  spi/bfin_spi: push all size checks into the transfer function
  spi/bfin_spi: use nosync when disabling the IRQ from the IRQ handler
  spi/bfin_spi: sync hardware state before reprogramming everything
  spi/bfin_spi: save/restore state when suspending/resuming
  spi/bfin_spi: redo GPIO CS handling
  Blackfin: SPI: expand SPI bitmasks
  spi/bfin_spi: use the SPI namespaced bit names
  spi/bfin_spi: drop extra memory we don't need
  ...
This commit is contained in:
Linus Torvalds 2010-10-21 14:37:00 -07:00
commit 70ada77920
24 changed files with 3857 additions and 1247 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
Documentation/powerpc/dts-bindings/fsl/spi.txt
View File

@ -1,7 +1,9 @@
* SPI (Serial Peripheral Interface)
Required properties:
- cell-index : SPI controller index.
- cell-index : QE SPI subblock index.
0: QE subblock SPI1
1: QE subblock SPI2
- compatible : should be "fsl,spi".
- mode : the SPI operation mode, it can be "cpu" or "cpu-qe".
- reg : Offset and length of the register set for the device
@ -29,3 +31,23 @@ Example:
gpios = <&gpio 18 1 // device reg=<0>
&gpio 19 1>; // device reg=<1>
};
* eSPI (Enhanced Serial Peripheral Interface)
Required properties:
- compatible : should be "fsl,mpc8536-espi".
- reg : Offset and length of the register set for the device.
- interrupts : should contain eSPI interrupt, the device has one interrupt.
- fsl,espi-num-chipselects : the number of the chipselect signals.
Example:
spi@110000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,mpc8536-espi";
reg = <0x110000 0x1000>;
interrupts = <53 0x2>;
interrupt-parent = <&mpic>;
fsl,espi-num-chipselects = <4>;
};

7
arch/arm/mach-lpc32xx/phy3250.c
View File

@ -172,18 +172,12 @@ static void phy3250_spi_cs_set(u32 control)
}
static struct pl022_config_chip spi0_chip_info = {
.lbm = LOOPBACK_DISABLED,
.com_mode = INTERRUPT_TRANSFER,
.iface = SSP_INTERFACE_MOTOROLA_SPI,
.hierarchy = SSP_MASTER,
.slave_tx_disable = 0,
.endian_tx = SSP_TX_LSB,
.endian_rx = SSP_RX_LSB,
.data_size = SSP_DATA_BITS_8,
.rx_lev_trig = SSP_RX_4_OR_MORE_ELEM,
.tx_lev_trig = SSP_TX_4_OR_MORE_EMPTY_LOC,
.clk_phase = SSP_CLK_FIRST_EDGE,
.clk_pol = SSP_CLK_POL_IDLE_LOW,
.ctrl_len = SSP_BITS_8,
.wait_state = SSP_MWIRE_WAIT_ZERO,
.duplex = SSP_MICROWIRE_CHANNEL_FULL_DUPLEX,
@ -239,6 +233,7 @@ static int __init phy3250_spi_board_register(void)
.max_speed_hz = 5000000,
.bus_num = 0,
.chip_select = 0,
.mode = SPI_MODE_0,
.platform_data = &eeprom,
.controller_data = &spi0_chip_info,
},

5
arch/arm/mach-u300/dummyspichip.c
View File

@ -46,7 +46,6 @@ static ssize_t dummy_looptest(struct device *dev,
* struct, this is just used here to alter the behaviour of the chip
* in order to perform tests.
*/
struct pl022_config_chip *chip_info = spi->controller_data;
int status;
u8 txbuf[14] = {0xDE, 0xAD, 0xBE, 0xEF, 0x2B, 0xAD,
0xCA, 0xFE, 0xBA, 0xBE, 0xB1, 0x05,
@ -72,7 +71,7 @@ static ssize_t dummy_looptest(struct device *dev,
* Force chip to 8 bit mode
* WARNING: NEVER DO THIS IN REAL DRIVER CODE, THIS SHOULD BE STATIC!
*/
chip_info->data_size = SSP_DATA_BITS_8;
spi->bits_per_word = 8;
/* You should NOT DO THIS EITHER */
spi->master->setup(spi);
@ -159,7 +158,7 @@ static ssize_t dummy_looptest(struct device *dev,
* Force chip to 16 bit mode
* WARNING: NEVER DO THIS IN REAL DRIVER CODE, THIS SHOULD BE STATIC!
*/
chip_info->data_size = SSP_DATA_BITS_16;
spi->bits_per_word = 16;
/* You should NOT DO THIS EITHER */
spi->master->setup(spi);

10
arch/arm/mach-u300/spi.c
View File

@ -30,8 +30,6 @@ static void select_dummy_chip(u32 chipselect)
}
struct pl022_config_chip dummy_chip_info = {
/* Nominally this is LOOPBACK_DISABLED, but this is our dummy chip! */
.lbm = LOOPBACK_ENABLED,
/*
* available POLLING_TRANSFER and INTERRUPT_TRANSFER,
* DMA_TRANSFER does not work
@ -42,14 +40,8 @@ struct pl022_config_chip dummy_chip_info = {
.hierarchy = SSP_MASTER,
/* 0 = drive TX even as slave, 1 = do not drive TX as slave */
.slave_tx_disable = 0,
/* LSB first */
.endian_tx = SSP_TX_LSB,
.endian_rx = SSP_RX_LSB,
.data_size = SSP_DATA_BITS_8, /* used to be 12 in some default */
.rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
.tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC,
.clk_phase = SSP_CLK_SECOND_EDGE,
.clk_pol = SSP_CLK_POL_IDLE_LOW,
.ctrl_len = SSP_BITS_12,
.wait_state = SSP_MWIRE_WAIT_ZERO,
.duplex = SSP_MICROWIRE_CHANNEL_FULL_DUPLEX,
@ -75,7 +67,7 @@ static struct spi_board_info u300_spi_devices[] = {
.bus_num = 0, /* Only one bus on this chip */
.chip_select = 0,
/* Means SPI_CS_HIGH, change if e.g low CS */
.mode = 0,
.mode = SPI_MODE_1 | SPI_LSB_FIRST | SPI_LOOP,
},
#endif
};

8
arch/arm/mach-ux500/board-mop500.c
View File

@ -55,19 +55,13 @@ static void ab4500_spi_cs_control(u32 command)
}
struct pl022_config_chip ab4500_chip_info = {
.lbm = LOOPBACK_DISABLED,
.com_mode = INTERRUPT_TRANSFER,
.iface = SSP_INTERFACE_MOTOROLA_SPI,
/* we can act as master only */
.hierarchy = SSP_MASTER,
.slave_tx_disable = 0,
.endian_rx = SSP_RX_MSB,
.endian_tx = SSP_TX_MSB,
.data_size = SSP_DATA_BITS_24,
.rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
.tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC,
.clk_phase = SSP_CLK_SECOND_EDGE,
.clk_pol = SSP_CLK_POL_IDLE_HIGH,
.cs_control = ab4500_spi_cs_control,
};
@ -83,7 +77,7 @@ static struct spi_board_info u8500_spi_devices[] = {
.max_speed_hz = 12000000,
.bus_num = 0,
.chip_select = 0,
.mode = SPI_MODE_0,
.mode = SPI_MODE_3,
.irq = IRQ_DB8500_AB8500,
},
};

3
arch/arm/plat-samsung/include/plat/s3c64xx-spi.h
View File

@ -32,6 +32,8 @@ struct s3c64xx_spi_csinfo {
* struct s3c64xx_spi_info - SPI Controller defining structure
* @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field.
* @src_clk_name: Platform name of the corresponding clock.
* @clk_from_cmu: If the SPI clock/prescalar control block is present
* by the platform's clock-management-unit and not in SPI controller.
* @num_cs: Number of CS this controller emulates.
* @cfg_gpio: Configure pins for this SPI controller.
* @fifo_lvl_mask: All tx fifo_lvl fields start at offset-6
@ -41,6 +43,7 @@ struct s3c64xx_spi_csinfo {
struct s3c64xx_spi_info {
int src_clk_nr;
char *src_clk_name;
bool clk_from_cmu;
int num_cs;

81
arch/blackfin/include/asm/bfin5xx_spi.h
View File

@ -11,26 +11,17 @@
#define MIN_SPI_BAUD_VAL 2
#define SPI_READ 0
#define SPI_WRITE 1
#define SPI_CTRL_OFF 0x0
#define SPI_FLAG_OFF 0x4
#define SPI_STAT_OFF 0x8
#define SPI_TXBUFF_OFF 0xc
#define SPI_RXBUFF_OFF 0x10
#define SPI_BAUD_OFF 0x14
#define SPI_SHAW_OFF 0x18
#define BIT_CTL_ENABLE 0x4000
#define BIT_CTL_OPENDRAIN 0x2000
#define BIT_CTL_MASTER 0x1000
#define BIT_CTL_POLAR 0x0800
#define BIT_CTL_PHASE 0x0400
#define BIT_CTL_BITORDER 0x0200
#define BIT_CTL_CPOL 0x0800
#define BIT_CTL_CPHA 0x0400
#define BIT_CTL_LSBF 0x0200
#define BIT_CTL_WORDSIZE 0x0100
#define BIT_CTL_MISOENABLE 0x0020
#define BIT_CTL_EMISO 0x0020
#define BIT_CTL_PSSE 0x0010
#define BIT_CTL_GM 0x0008
#define BIT_CTL_SZ 0x0004
#define BIT_CTL_RXMOD 0x0000
#define BIT_CTL_TXMOD 0x0001
#define BIT_CTL_TIMOD_DMA_TX 0x0003
@ -50,61 +41,7 @@
#define BIT_STU_SENDOVER 0x0001
#define BIT_STU_RECVFULL 0x0020
#define CFG_SPI_ENABLE 1
#define CFG_SPI_DISABLE 0
#define CFG_SPI_OUTENABLE 1
#define CFG_SPI_OUTDISABLE 0
#define CFG_SPI_ACTLOW 1
#define CFG_SPI_ACTHIGH 0
#define CFG_SPI_PHASESTART 1
#define CFG_SPI_PHASEMID 0
#define CFG_SPI_MASTER 1
#define CFG_SPI_SLAVE 0
#define CFG_SPI_SENELAST 0
#define CFG_SPI_SENDZERO 1
#define CFG_SPI_RCVFLUSH 1
#define CFG_SPI_RCVDISCARD 0
#define CFG_SPI_LSBFIRST 1
#define CFG_SPI_MSBFIRST 0
#define CFG_SPI_WORDSIZE16 1
#define CFG_SPI_WORDSIZE8 0
#define CFG_SPI_MISOENABLE 1
#define CFG_SPI_MISODISABLE 0
#define CFG_SPI_READ 0x00
#define CFG_SPI_WRITE 0x01
#define CFG_SPI_DMAREAD 0x02
#define CFG_SPI_DMAWRITE 0x03
#define CFG_SPI_CSCLEARALL 0
#define CFG_SPI_CHIPSEL1 1
#define CFG_SPI_CHIPSEL2 2
#define CFG_SPI_CHIPSEL3 3
#define CFG_SPI_CHIPSEL4 4
#define CFG_SPI_CHIPSEL5 5
#define CFG_SPI_CHIPSEL6 6
#define CFG_SPI_CHIPSEL7 7
#define CFG_SPI_CS1VALUE 1
#define CFG_SPI_CS2VALUE 2
#define CFG_SPI_CS3VALUE 3
#define CFG_SPI_CS4VALUE 4
#define CFG_SPI_CS5VALUE 5
#define CFG_SPI_CS6VALUE 6
#define CFG_SPI_CS7VALUE 7
#define CMD_SPI_SET_BAUDRATE 2
#define CMD_SPI_GET_SYSTEMCLOCK 25
#define CMD_SPI_SET_WRITECONTINUOUS 26
#define MAX_CTRL_CS 8 /* cs in spi controller */
/* device.platform_data for SSP controller devices */
struct bfin5xx_spi_master {
@ -120,9 +57,7 @@ struct bfin5xx_spi_chip {
u16 ctl_reg;
u8 enable_dma;
u8 bits_per_word;
u8 cs_change_per_word;
u16 cs_chg_udelay; /* Some devices require 16-bit delays */
u32 cs_gpio;
/* Value to send if no TX value is supplied, usually 0x0 or 0xFFFF */
u16 idle_tx_val;
u8 pio_interrupt; /* Enable spi data irq */

52
arch/powerpc/boot/dts/mpc8536ds.dts
View File

@ -108,6 +108,58 @@
};
};
spi@7000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,mpc8536-espi";
reg = <0x7000 0x1000>;
interrupts = <59 0x2>;
interrupt-parent = <&mpic>;
fsl,espi-num-chipselects = <4>;
flash@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "spansion,s25sl12801";
reg = <0>;
spi-max-frequency = <40000000>;
partition@u-boot {
label = "u-boot";
reg = <0x00000000 0x00100000>;
read-only;
};
partition@kernel {
label = "kernel";
reg = <0x00100000 0x00500000>;
read-only;
};
partition@dtb {
label = "dtb";
reg = <0x00600000 0x00100000>;
read-only;
};
partition@fs {
label = "file system";
reg = <0x00700000 0x00900000>;
};
};
flash@1 {
compatible = "spansion,s25sl12801";
reg = <1>;
spi-max-frequency = <40000000>;
};
flash@2 {
compatible = "spansion,s25sl12801";
reg = <2>;
spi-max-frequency = <40000000>;
};
flash@3 {
compatible = "spansion,s25sl12801";
reg = <3>;
spi-max-frequency = <40000000>;
};
};
dma@21300 {
#address-cells = <1>;
#size-cells = <1>;

11
arch/powerpc/boot/dts/p4080ds.dts
View File

@ -236,22 +236,19 @@
};
spi@110000 {
cell-index = <0>;
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,espi";
compatible = "fsl,p4080-espi", "fsl,mpc8536-espi";
reg = <0x110000 0x1000>;
interrupts = <53 0x2>;
interrupt-parent = <&mpic>;
espi,num-ss-bits = <4>;
mode = "cpu";
fsl,espi-num-chipselects = <4>;
fsl_m25p80@0 {
flash@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "fsl,espi-flash";
compatible = "spansion,s25sl12801";
reg = <0>;
linux,modalias = "fsl_m25p80";
spi-max-frequency = <40000000>; /* input clock */
partition@u-boot {
label = "u-boot";

5
drivers/mfd/ab8500-spi.c
View File

@ -83,6 +83,11 @@ static int __devinit ab8500_spi_probe(struct spi_device *spi)
struct ab8500 *ab8500;
int ret;
spi->bits_per_word = 24;
ret = spi_setup(spi);
if (ret < 0)
return ret;
ab8500 = kzalloc(sizeof *ab8500, GFP_KERNEL);
if (!ab8500)
return -ENOMEM;

30
drivers/spi/Kconfig
View File

@ -182,12 +182,27 @@ config SPI_MPC512x_PSC
This enables using the Freescale MPC5121 Programmable Serial
Controller in SPI master mode.
config SPI_MPC8xxx
tristate "Freescale MPC8xxx SPI controller"
config SPI_FSL_LIB
tristate
depends on FSL_SOC
config SPI_FSL_SPI
tristate "Freescale SPI controller"
depends on FSL_SOC
select SPI_FSL_LIB
help
This enables using the Freescale MPC8xxx SPI controllers in master
mode.
This enables using the Freescale SPI controllers in master mode.
MPC83xx platform uses the controller in cpu mode or CPM/QE mode.
MPC8569 uses the controller in QE mode, MPC8610 in cpu mode.
config SPI_FSL_ESPI
tristate "Freescale eSPI controller"
depends on FSL_SOC
select SPI_FSL_LIB
help
This enables using the Freescale eSPI controllers in master mode.
From MPC8536, 85xx platform uses the controller, and all P10xx,
P20xx, P30xx,P40xx, P50xx uses this controller.
config SPI_OMAP_UWIRE
tristate "OMAP1 MicroWire"
@ -298,6 +313,13 @@ config SPI_STMP3XXX
help
SPI driver for Freescale STMP37xx/378x SoC SSP interface
config SPI_TOPCLIFF_PCH
tristate "Topcliff PCH SPI Controller"
depends on PCI
help
SPI driver for the Topcliff PCH (Platform Controller Hub) SPI bus
used in some x86 embedded processors.
config SPI_TXX9
tristate "Toshiba TXx9 SPI controller"
depends on GENERIC_GPIO && CPU_TX49XX

9
drivers/spi/Makefile
View File

@ -2,9 +2,7 @@
# Makefile for kernel SPI drivers.
#
ifeq ($(CONFIG_SPI_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
endif
ccflags-$(CONFIG_SPI_DEBUG) := -DDEBUG
# small core, mostly translating board-specific
# config declarations into driver model code
@ -34,11 +32,14 @@ obj-$(CONFIG_SPI_PL022) += amba-pl022.o
obj-$(CONFIG_SPI_MPC512x_PSC) += mpc512x_psc_spi.o
obj-$(CONFIG_SPI_MPC52xx_PSC) += mpc52xx_psc_spi.o
obj-$(CONFIG_SPI_MPC52xx) += mpc52xx_spi.o
obj-$(CONFIG_SPI_MPC8xxx) += spi_mpc8xxx.o
obj-$(CONFIG_SPI_FSL_LIB) += spi_fsl_lib.o
obj-$(CONFIG_SPI_FSL_ESPI) += spi_fsl_espi.o
obj-$(CONFIG_SPI_FSL_SPI) += spi_fsl_spi.o
obj-$(CONFIG_SPI_PPC4xx) += spi_ppc4xx.o
obj-$(CONFIG_SPI_S3C24XX_GPIO) += spi_s3c24xx_gpio.o
obj-$(CONFIG_SPI_S3C24XX) += spi_s3c24xx_hw.o
obj-$(CONFIG_SPI_S3C64XX) += spi_s3c64xx.o
obj-$(CONFIG_SPI_TOPCLIFF_PCH) += spi_topcliff_pch.o
obj-$(CONFIG_SPI_TXX9) += spi_txx9.o
obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o
obj-$(CONFIG_SPI_XILINX_OF) += xilinx_spi_of.o

755
drivers/spi/amba-pl022.c
View File

File diff suppressed because it is too large Load Diff

14
drivers/spi/atmel_spi.c
View File

@ -654,6 +654,8 @@ static int atmel_spi_transfer(struct spi_device *spi, struct spi_message *msg)
struct spi_transfer *xfer;
unsigned long flags;
struct device *controller = spi->master->dev.parent;
u8 bits;
struct atmel_spi_device *asd;
as = spi_master_get_devdata(spi->master);
@ -672,8 +674,18 @@ static int atmel_spi_transfer(struct spi_device *spi, struct spi_message *msg)
return -EINVAL;
}
if (xfer->bits_per_word) {
asd = spi->controller_state;
bits = (asd->csr >> 4) & 0xf;
if (bits != xfer->bits_per_word - 8) {
dev_dbg(&spi->dev, "you can't yet change "
"bits_per_word in transfers\n");
return -ENOPROTOOPT;
}
}
/* FIXME implement these protocol options!! */
if (xfer->bits_per_word || xfer->speed_hz) {
if (xfer->speed_hz) {
dev_dbg(&spi->dev, "no protocol options yet\n");
return -ENOPROTOOPT;
}

81
drivers/spi/omap2_mcspi.c
View File

@ -296,6 +296,19 @@ static int omap2_mcspi_enable_clocks(struct omap2_mcspi *mcspi)
return 0;
}
static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit)
{
unsigned long timeout;
timeout = jiffies + msecs_to_jiffies(1000);
while (!(__raw_readl(reg) & bit)) {
if (time_after(jiffies, timeout))
return -1;
cpu_relax();
}
return 0;
}
static unsigned
omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
{
@ -309,11 +322,14 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
u32 l;
u8 * rx;
const u8 * tx;
void __iomem *chstat_reg;
mcspi = spi_master_get_devdata(spi->master);
mcspi_dma = &mcspi->dma_channels[spi->chip_select];
l = mcspi_cached_chconf0(spi);
chstat_reg = cs->base + OMAP2_MCSPI_CHSTAT0;
count = xfer->len;
c = count;
word_len = cs->word_len;
@ -382,6 +398,16 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
if (tx != NULL) {
wait_for_completion(&mcspi_dma->dma_tx_completion);
dma_unmap_single(NULL, xfer->tx_dma, count, DMA_TO_DEVICE);
/* for TX_ONLY mode, be sure all words have shifted out */
if (rx == NULL) {
if (mcspi_wait_for_reg_bit(chstat_reg,
OMAP2_MCSPI_CHSTAT_TXS) < 0)
dev_err(&spi->dev, "TXS timed out\n");
else if (mcspi_wait_for_reg_bit(chstat_reg,
OMAP2_MCSPI_CHSTAT_EOT) < 0)
dev_err(&spi->dev, "EOT timed out\n");
}
}
if (rx != NULL) {
@ -435,19 +461,6 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
return count;
}
static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit)
{
unsigned long timeout;
timeout = jiffies + msecs_to_jiffies(1000);
while (!(__raw_readl(reg) & bit)) {
if (time_after(jiffies, timeout))
return -1;
cpu_relax();
}
return 0;
}
static unsigned
omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
{
@ -489,10 +502,8 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
dev_err(&spi->dev, "TXS timed out\n");
goto out;
}
#ifdef VERBOSE
dev_dbg(&spi->dev, "write-%d %02x\n",
dev_vdbg(&spi->dev, "write-%d %02x\n",
word_len, *tx);
#endif
__raw_writel(*tx++, tx_reg);
}
if (rx != NULL) {
@ -506,10 +517,8 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
(l & OMAP2_MCSPI_CHCONF_TURBO)) {
omap2_mcspi_set_enable(spi, 0);
*rx++ = __raw_readl(rx_reg);
#ifdef VERBOSE
dev_dbg(&spi->dev, "read-%d %02x\n",
dev_vdbg(&spi->dev, "read-%d %02x\n",
word_len, *(rx - 1));
#endif
if (mcspi_wait_for_reg_bit(chstat_reg,
OMAP2_MCSPI_CHSTAT_RXS) < 0) {
dev_err(&spi->dev,
@ -522,10 +531,8 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
}
*rx++ = __raw_readl(rx_reg);
#ifdef VERBOSE
dev_dbg(&spi->dev, "read-%d %02x\n",
dev_vdbg(&spi->dev, "read-%d %02x\n",
word_len, *(rx - 1));
#endif
}
} while (c);
} else if (word_len <= 16) {
@ -542,10 +549,8 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
dev_err(&spi->dev, "TXS timed out\n");
goto out;
}
#ifdef VERBOSE
dev_dbg(&spi->dev, "write-%d %04x\n",
dev_vdbg(&spi->dev, "write-%d %04x\n",
word_len, *tx);
#endif
__raw_writel(*tx++, tx_reg);
}
if (rx != NULL) {
@ -559,10 +564,8 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
(l & OMAP2_MCSPI_CHCONF_TURBO)) {
omap2_mcspi_set_enable(spi, 0);
*rx++ = __raw_readl(rx_reg);
#ifdef VERBOSE
dev_dbg(&spi->dev, "read-%d %04x\n",
dev_vdbg(&spi->dev, "read-%d %04x\n",
word_len, *(rx - 1));
#endif
if (mcspi_wait_for_reg_bit(chstat_reg,
OMAP2_MCSPI_CHSTAT_RXS) < 0) {
dev_err(&spi->dev,
@ -575,10 +578,8 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
}
*rx++ = __raw_readl(rx_reg);
#ifdef VERBOSE
dev_dbg(&spi->dev, "read-%d %04x\n",
dev_vdbg(&spi->dev, "read-%d %04x\n",
word_len, *(rx - 1));
#endif
}
} while (c);
} else if (word_len <= 32) {
@ -595,10 +596,8 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
dev_err(&spi->dev, "TXS timed out\n");
goto out;
}
#ifdef VERBOSE
dev_dbg(&spi->dev, "write-%d %08x\n",
dev_vdbg(&spi->dev, "write-%d %08x\n",
word_len, *tx);
#endif
__raw_writel(*tx++, tx_reg);
}
if (rx != NULL) {
@ -612,10 +611,8 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
(l & OMAP2_MCSPI_CHCONF_TURBO)) {
omap2_mcspi_set_enable(spi, 0);
*rx++ = __raw_readl(rx_reg);
#ifdef VERBOSE
dev_dbg(&spi->dev, "read-%d %08x\n",
dev_vdbg(&spi->dev, "read-%d %08x\n",
word_len, *(rx - 1));
#endif
if (mcspi_wait_for_reg_bit(chstat_reg,
OMAP2_MCSPI_CHSTAT_RXS) < 0) {
dev_err(&spi->dev,
@ -628,10 +625,8 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
}
*rx++ = __raw_readl(rx_reg);
#ifdef VERBOSE
dev_dbg(&spi->dev, "read-%d %08x\n",
dev_vdbg(&spi->dev, "read-%d %08x\n",
word_len, *(rx - 1));
#endif
}
} while (c);
}
@ -644,6 +639,12 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
} else if (mcspi_wait_for_reg_bit(chstat_reg,
OMAP2_MCSPI_CHSTAT_EOT) < 0)
dev_err(&spi->dev, "EOT timed out\n");
/* disable chan to purge rx datas received in TX_ONLY transfer,
* otherwise these rx datas will affect the direct following
* RX_ONLY transfer.
*/
omap2_mcspi_set_enable(spi, 0);
}
out:
omap2_mcspi_set_enable(spi, 1);

4
drivers/spi/orion_spi.c
View File

@ -404,7 +404,7 @@ static int orion_spi_transfer(struct spi_device *spi, struct spi_message *m)
goto msg_rejected;
}
if ((t != NULL) && t->bits_per_word)
if (t->bits_per_word)
bits_per_word = t->bits_per_word;
if ((bits_per_word != 8) && (bits_per_word != 16)) {
@ -415,7 +415,7 @@ static int orion_spi_transfer(struct spi_device *spi, struct spi_message *m)
goto msg_rejected;
}
/*make sure buffer length is even when working in 16 bit mode*/
if ((t != NULL) && (t->bits_per_word == 16) && (t->len & 1)) {
if ((t->bits_per_word == 16) && (t->len & 1)) {
dev_err(&spi->dev,
"message rejected : "
"odd data length (%d) while in 16 bit mode\n",

876
drivers/spi/spi_bfin5xx.c
View File

File diff suppressed because it is too large Load Diff

748
drivers/spi/spi_fsl_espi.c Normal file
View File

@ -0,0 +1,748 @@
/*
* Freescale eSPI controller driver.
*
* Copyright 2010 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/spi/spi.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include <linux/mm.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_spi.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <sysdev/fsl_soc.h>
#include "spi_fsl_lib.h"
/* eSPI Controller registers */
struct fsl_espi_reg {
__be32 mode; /* 0x000 - eSPI mode register */
__be32 event; /* 0x004 - eSPI event register */
__be32 mask; /* 0x008 - eSPI mask register */
__be32 command; /* 0x00c - eSPI command register */
__be32 transmit; /* 0x010 - eSPI transmit FIFO access register*/
__be32 receive; /* 0x014 - eSPI receive FIFO access register*/
u8 res[8]; /* 0x018 - 0x01c reserved */
__be32 csmode[4]; /* 0x020 - 0x02c eSPI cs mode register */
};
struct fsl_espi_transfer {
const void *tx_buf;
void *rx_buf;
unsigned len;
unsigned n_tx;
unsigned n_rx;
unsigned actual_length;
int status;
};
/* eSPI Controller mode register definitions */
#define SPMODE_ENABLE (1 << 31)
#define SPMODE_LOOP (1 << 30)
#define SPMODE_TXTHR(x) ((x) << 8)
#define SPMODE_RXTHR(x) ((x) << 0)
/* eSPI Controller CS mode register definitions */
#define CSMODE_CI_INACTIVEHIGH (1 << 31)
#define CSMODE_CP_BEGIN_EDGECLK (1 << 30)
#define CSMODE_REV (1 << 29)
#define CSMODE_DIV16 (1 << 28)
#define CSMODE_PM(x) ((x) << 24)
#define CSMODE_POL_1 (1 << 20)
#define CSMODE_LEN(x) ((x) << 16)
#define CSMODE_BEF(x) ((x) << 12)
#define CSMODE_AFT(x) ((x) << 8)
#define CSMODE_CG(x) ((x) << 3)
/* Default mode/csmode for eSPI controller */
#define SPMODE_INIT_VAL (SPMODE_TXTHR(4) | SPMODE_RXTHR(3))
#define CSMODE_INIT_VAL (CSMODE_POL_1 | CSMODE_BEF(0) \
| CSMODE_AFT(0) | CSMODE_CG(1))
/* SPIE register values */
#define SPIE_NE 0x00000200 /* Not empty */
#define SPIE_NF 0x00000100 /* Not full */
/* SPIM register values */
#define SPIM_NE 0x00000200 /* Not empty */
#define SPIM_NF 0x00000100 /* Not full */
#define SPIE_RXCNT(reg) ((reg >> 24) & 0x3F)
#define SPIE_TXCNT(reg) ((reg >> 16) & 0x3F)
/* SPCOM register values */
#define SPCOM_CS(x) ((x) << 30)
#define SPCOM_TRANLEN(x) ((x) << 0)
#define SPCOM_TRANLEN_MAX 0xFFFF /* Max transaction length */
static void fsl_espi_change_mode(struct spi_device *spi)
{
struct mpc8xxx_spi *mspi = spi_master_get_devdata(spi->master);
struct spi_mpc8xxx_cs *cs = spi->controller_state;
struct fsl_espi_reg *reg_base = mspi->reg_base;
__be32 __iomem *mode = &reg_base->csmode[spi->chip_select];
__be32 __iomem *espi_mode = &reg_base->mode;
u32 tmp;
unsigned long flags;
/* Turn off IRQs locally to minimize time that SPI is disabled. */
local_irq_save(flags);
/* Turn off SPI unit prior changing mode */
tmp = mpc8xxx_spi_read_reg(espi_mode);
mpc8xxx_spi_write_reg(espi_mode, tmp & ~SPMODE_ENABLE);
mpc8xxx_spi_write_reg(mode, cs->hw_mode);
mpc8xxx_spi_write_reg(espi_mode, tmp);
local_irq_restore(flags);
}
static u32 fsl_espi_tx_buf_lsb(struct mpc8xxx_spi *mpc8xxx_spi)
{
u32 data;
u16 data_h;
u16 data_l;
const u32 *tx = mpc8xxx_spi->tx;
if (!tx)
return 0;
data = *tx++ << mpc8xxx_spi->tx_shift;
data_l = data & 0xffff;
data_h = (data >> 16) & 0xffff;
swab16s(&data_l);
swab16s(&data_h);
data = data_h | data_l;
mpc8xxx_spi->tx = tx;
return data;
}
static int fsl_espi_setup_transfer(struct spi_device *spi,
struct spi_transfer *t)
{
struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
int bits_per_word = 0;
u8 pm;
u32 hz = 0;
struct spi_mpc8xxx_cs *cs = spi->controller_state;
if (t) {
bits_per_word = t->bits_per_word;
hz = t->speed_hz;
}
/* spi_transfer level calls that work per-word */
if (!bits_per_word)
bits_per_word = spi->bits_per_word;
/* Make sure its a bit width we support [4..16] */
if ((bits_per_word < 4) || (bits_per_word > 16))
return -EINVAL;
if (!hz)
hz = spi->max_speed_hz;
cs->rx_shift = 0;
cs->tx_shift = 0;
cs->get_rx = mpc8xxx_spi_rx_buf_u32;
cs->get_tx = mpc8xxx_spi_tx_buf_u32;
if (bits_per_word <= 8) {
cs->rx_shift = 8 - bits_per_word;
} else if (bits_per_word <= 16) {
cs->rx_shift = 16 - bits_per_word;
if (spi->mode & SPI_LSB_FIRST)
cs->get_tx = fsl_espi_tx_buf_lsb;
} else {
return -EINVAL;
}
mpc8xxx_spi->rx_shift = cs->rx_shift;
mpc8xxx_spi->tx_shift = cs->tx_shift;
mpc8xxx_spi->get_rx = cs->get_rx;
mpc8xxx_spi->get_tx = cs->get_tx;
bits_per_word = bits_per_word - 1;
/* mask out bits we are going to set */
cs->hw_mode &= ~(CSMODE_LEN(0xF) | CSMODE_DIV16 | CSMODE_PM(0xF));
cs->hw_mode |= CSMODE_LEN(bits_per_word);
if ((mpc8xxx_spi->spibrg / hz) > 64) {
cs->hw_mode |= CSMODE_DIV16;
pm = (mpc8xxx_spi->spibrg - 1) / (hz * 64) + 1;
WARN_ONCE(pm > 16, "%s: Requested speed is too low: %d Hz. "
"Will use %d Hz instead.\n", dev_name(&spi->dev),
hz, mpc8xxx_spi->spibrg / 1024);
if (pm > 16)
pm = 16;
} else {
pm = (mpc8xxx_spi->spibrg - 1) / (hz * 4) + 1;
}
if (pm)
pm--;
cs->hw_mode |= CSMODE_PM(pm);
fsl_espi_change_mode(spi);
return 0;
}
static int fsl_espi_cpu_bufs(struct mpc8xxx_spi *mspi, struct spi_transfer *t,
unsigned int len)
{
u32 word;
struct fsl_espi_reg *reg_base = mspi->reg_base;
mspi->count = len;
/* enable rx ints */
mpc8xxx_spi_write_reg(&reg_base->mask, SPIM_NE);
/* transmit word */
word = mspi->get_tx(mspi);
mpc8xxx_spi_write_reg(&reg_base->transmit, word);
return 0;
}
static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t)
{
struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
struct fsl_espi_reg *reg_base = mpc8xxx_spi->reg_base;
unsigned int len = t->len;
u8 bits_per_word;
int ret;
bits_per_word = spi->bits_per_word;
if (t->bits_per_word)
bits_per_word = t->bits_per_word;
mpc8xxx_spi->len = t->len;
len = roundup(len, 4) / 4;
mpc8xxx_spi->tx = t->tx_buf;
mpc8xxx_spi->rx = t->rx_buf;
INIT_COMPLETION(mpc8xxx_spi->done);
/* Set SPCOM[CS] and SPCOM[TRANLEN] field */
if ((t->len - 1) > SPCOM_TRANLEN_MAX) {
dev_err(mpc8xxx_spi->dev, "Transaction length (%d)"
" beyond the SPCOM[TRANLEN] field\n", t->len);
return -EINVAL;
}
mpc8xxx_spi_write_reg(&reg_base->command,
(SPCOM_CS(spi->chip_select) | SPCOM_TRANLEN(t->len - 1)));
ret = fsl_espi_cpu_bufs(mpc8xxx_spi, t, len);
if (ret)
return ret;
wait_for_completion(&mpc8xxx_spi->done);
/* disable rx ints */
mpc8xxx_spi_write_reg(&reg_base->mask, 0);
return mpc8xxx_spi->count;
}
static void fsl_espi_addr2cmd(unsigned int addr, u8 *cmd)
{
if (cmd[1] && cmd[2] && cmd[3]) {
cmd[1] = (u8)(addr >> 16);
cmd[2] = (u8)(addr >> 8);
cmd[3] = (u8)(addr >> 0);
}
}
static unsigned int fsl_espi_cmd2addr(u8 *cmd)
{
if (cmd[1] && cmd[2] && cmd[3])
return cmd[1] << 16 | cmd[2] << 8 | cmd[3] << 0;
return 0;
}
static void fsl_espi_do_trans(struct spi_message *m,
struct fsl_espi_transfer *tr)
{
struct spi_device *spi = m->spi;
struct mpc8xxx_spi *mspi = spi_master_get_devdata(spi->master);
struct fsl_espi_transfer *espi_trans = tr;
struct spi_message message;
struct spi_transfer *t, *first, trans;
int status = 0;
spi_message_init(&message);
memset(&trans, 0, sizeof(trans));
first = list_first_entry(&m->transfers, struct spi_transfer,
transfer_list);
list_for_each_entry(t, &m->transfers, transfer_list) {
if ((first->bits_per_word != t->bits_per_word) ||
(first->speed_hz != t->speed_hz)) {
espi_trans->status = -EINVAL;
dev_err(mspi->dev, "bits_per_word/speed_hz should be"
" same for the same SPI transfer\n");
return;
}
trans.speed_hz = t->speed_hz;
trans.bits_per_word = t->bits_per_word;
trans.delay_usecs = max(first->delay_usecs, t->delay_usecs);
}
trans.len = espi_trans->len;
trans.tx_buf = espi_trans->tx_buf;
trans.rx_buf = espi_trans->rx_buf;
spi_message_add_tail(&trans, &message);
list_for_each_entry(t, &message.transfers, transfer_list) {
if (t->bits_per_word || t->speed_hz) {
status = -EINVAL;
status = fsl_espi_setup_transfer(spi, t);
if (status < 0)
break;
}
if (t->len)
status = fsl_espi_bufs(spi, t);
if (status) {
status = -EMSGSIZE;
break;
}
if (t->delay_usecs)
udelay(t->delay_usecs);
}
espi_trans->status = status;
fsl_espi_setup_transfer(spi, NULL);
}
static void fsl_espi_cmd_trans(struct spi_message *m,
struct fsl_espi_transfer *trans, u8 *rx_buff)
{
struct spi_transfer *t;
u8 *local_buf;
int i = 0;
struct fsl_espi_transfer *espi_trans = trans;
local_buf = kzalloc(SPCOM_TRANLEN_MAX, GFP_KERNEL);
if (!local_buf) {
espi_trans->status = -ENOMEM;
return;
}
list_for_each_entry(t, &m->transfers, transfer_list) {
if (t->tx_buf) {
memcpy(local_buf + i, t->tx_buf, t->len);
i += t->len;
}
}
espi_trans->tx_buf = local_buf;
espi_trans->rx_buf = local_buf + espi_trans->n_tx;
fsl_espi_do_trans(m, espi_trans);
espi_trans->actual_length = espi_trans->len;
kfree(local_buf);
}
static void fsl_espi_rw_trans(struct spi_message *m,
struct fsl_espi_transfer *trans, u8 *rx_buff)
{
struct fsl_espi_transfer *espi_trans = trans;
unsigned int n_tx = espi_trans->n_tx;
unsigned int n_rx = espi_trans->n_rx;
struct spi_transfer *t;
u8 *local_buf;
u8 *rx_buf = rx_buff;
unsigned int trans_len;
unsigned int addr;
int i, pos, loop;
local_buf = kzalloc(SPCOM_TRANLEN_MAX, GFP_KERNEL);
if (!local_buf) {
espi_trans->status = -ENOMEM;
return;
}
for (pos = 0, loop = 0; pos < n_rx; pos += trans_len, loop++) {
trans_len = n_rx - pos;
if (trans_len > SPCOM_TRANLEN_MAX - n_tx)
trans_len = SPCOM_TRANLEN_MAX - n_tx;
i = 0;
list_for_each_entry(t, &m->transfers, transfer_list) {
if (t->tx_buf) {
memcpy(local_buf + i, t->tx_buf, t->len);
i += t->len;
}
}
addr = fsl_espi_cmd2addr(local_buf);
addr += pos;
fsl_espi_addr2cmd(addr, local_buf);
espi_trans->n_tx = n_tx;
espi_trans->n_rx = trans_len;
espi_trans->len = trans_len + n_tx;
espi_trans->tx_buf = local_buf;
espi_trans->rx_buf = local_buf + n_tx;
fsl_espi_do_trans(m, espi_trans);
memcpy(rx_buf + pos, espi_trans->rx_buf + n_tx, trans_len);
if (loop > 0)
espi_trans->actual_length += espi_trans->len - n_tx;
else
espi_trans->actual_length += espi_trans->len;
}
kfree(local_buf);
}
static void fsl_espi_do_one_msg(struct spi_message *m)
{
struct spi_transfer *t;
u8 *rx_buf = NULL;
unsigned int n_tx = 0;
unsigned int n_rx = 0;
struct fsl_espi_transfer espi_trans;
list_for_each_entry(t, &m->transfers, transfer_list) {
if (t->tx_buf)
n_tx += t->len;
if (t->rx_buf) {
n_rx += t->len;
rx_buf = t->rx_buf;
}
}
espi_trans.n_tx = n_tx;
espi_trans.n_rx = n_rx;
espi_trans.len = n_tx + n_rx;
espi_trans.actual_length = 0;
espi_trans.status = 0;
if (!rx_buf)
fsl_espi_cmd_trans(m, &espi_trans, NULL);
else
fsl_espi_rw_trans(m, &espi_trans, rx_buf);
m->actual_length = espi_trans.actual_length;
m->status = espi_trans.status;
m->complete(m->context);
}
static int fsl_espi_setup(struct spi_device *spi)
{
struct mpc8xxx_spi *mpc8xxx_spi;
struct fsl_espi_reg *reg_base;
int retval;
u32 hw_mode;
u32 loop_mode;
struct spi_mpc8xxx_cs *cs = spi->controller_state;
if (!spi->max_speed_hz)
return -EINVAL;
if (!cs) {
cs = kzalloc(sizeof *cs, GFP_KERNEL);
if (!cs)
return -ENOMEM;
spi->controller_state = cs;
}
mpc8xxx_spi = spi_master_get_devdata(spi->master);
reg_base = mpc8xxx_spi->reg_base;
hw_mode = cs->hw_mode; /* Save orginal settings */
cs->hw_mode = mpc8xxx_spi_read_reg(
&reg_base->csmode[spi->chip_select]);
/* mask out bits we are going to set */
cs->hw_mode &= ~(CSMODE_CP_BEGIN_EDGECLK | CSMODE_CI_INACTIVEHIGH
| CSMODE_REV);
if (spi->mode & SPI_CPHA)
cs->hw_mode |= CSMODE_CP_BEGIN_EDGECLK;
if (spi->mode & SPI_CPOL)
cs->hw_mode |= CSMODE_CI_INACTIVEHIGH;
if (!(spi->mode & SPI_LSB_FIRST))
cs->hw_mode |= CSMODE_REV;
/* Handle the loop mode */
loop_mode = mpc8xxx_spi_read_reg(&reg_base->mode);
loop_mode &= ~SPMODE_LOOP;
if (spi->mode & SPI_LOOP)
loop_mode |= SPMODE_LOOP;
mpc8xxx_spi_write_reg(&reg_base->mode, loop_mode);
retval = fsl_espi_setup_transfer(spi, NULL);
if (retval < 0) {
cs->hw_mode = hw_mode; /* Restore settings */
return retval;
}
return 0;
}
void fsl_espi_cpu_irq(struct mpc8xxx_spi *mspi, u32 events)
{
struct fsl_espi_reg *reg_base = mspi->reg_base;
/* We need handle RX first */
if (events & SPIE_NE) {
u32 rx_data;
/* Spin until RX is done */
while (SPIE_RXCNT(events) < min(4, mspi->len)) {
cpu_relax();
events = mpc8xxx_spi_read_reg(&reg_base->event);
}
mspi->len -= 4;
rx_data = mpc8xxx_spi_read_reg(&reg_base->receive);
if (mspi->rx)
mspi->get_rx(rx_data, mspi);
}
if (!(events & SPIE_NF)) {
int ret;
/* spin until TX is done */
ret = spin_event_timeout(((events = mpc8xxx_spi_read_reg(
&reg_base->event)) & SPIE_NF) == 0, 1000, 0);
if (!ret) {
dev_err(mspi->dev, "tired waiting for SPIE_NF\n");
return;
}
}
/* Clear the events */
mpc8xxx_spi_write_reg(&reg_base->event, events);
mspi->count -= 1;
if (mspi->count) {
u32 word = mspi->get_tx(mspi);
mpc8xxx_spi_write_reg(&reg_base->transmit, word);
} else {
complete(&mspi->done);
}
}
static irqreturn_t fsl_espi_irq(s32 irq, void *context_data)
{
struct mpc8xxx_spi *mspi = context_data;
struct fsl_espi_reg *reg_base = mspi->reg_base;
irqreturn_t ret = IRQ_NONE;
u32 events;
/* Get interrupt events(tx/rx) */
events = mpc8xxx_spi_read_reg(&reg_base->event);
if (events)
ret = IRQ_HANDLED;
dev_vdbg(mspi->dev, "%s: events %x\n", __func__, events);
fsl_espi_cpu_irq(mspi, events);
return ret;
}
static void fsl_espi_remove(struct mpc8xxx_spi *mspi)
{
iounmap(mspi->reg_base);
}
static struct spi_master * __devinit fsl_espi_probe(struct device *dev,
struct resource *mem, unsigned int irq)
{
struct fsl_spi_platform_data *pdata = dev->platform_data;
struct spi_master *master;
struct mpc8xxx_spi *mpc8xxx_spi;
struct fsl_espi_reg *reg_base;
u32 regval;
int i, ret = 0;
master = spi_alloc_master(dev, sizeof(struct mpc8xxx_spi));
if (!master) {
ret = -ENOMEM;
goto err;
}
dev_set_drvdata(dev, master);
ret = mpc8xxx_spi_probe(dev, mem, irq);
if (ret)
goto err_probe;
master->setup = fsl_espi_setup;
mpc8xxx_spi = spi_master_get_devdata(master);
mpc8xxx_spi->spi_do_one_msg = fsl_espi_do_one_msg;
mpc8xxx_spi->spi_remove = fsl_espi_remove;
mpc8xxx_spi->reg_base = ioremap(mem->start, resource_size(mem));
if (!mpc8xxx_spi->reg_base) {
ret = -ENOMEM;
goto err_probe;
}
reg_base = mpc8xxx_spi->reg_base;
/* Register for SPI Interrupt */
ret = request_irq(mpc8xxx_spi->irq, fsl_espi_irq,
0, "fsl_espi", mpc8xxx_spi);
if (ret)
goto free_irq;
if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) {
mpc8xxx_spi->rx_shift = 16;
mpc8xxx_spi->tx_shift = 24;
}
/* SPI controller initializations */
mpc8xxx_spi_write_reg(&reg_base->mode, 0);
mpc8xxx_spi_write_reg(&reg_base->mask, 0);
mpc8xxx_spi_write_reg(&reg_base->command, 0);
mpc8xxx_spi_write_reg(&reg_base->event, 0xffffffff);
/* Init eSPI CS mode register */
for (i = 0; i < pdata->max_chipselect; i++)
mpc8xxx_spi_write_reg(&reg_base->csmode[i], CSMODE_INIT_VAL);
/* Enable SPI interface */
regval = pdata->initial_spmode | SPMODE_INIT_VAL | SPMODE_ENABLE;
mpc8xxx_spi_write_reg(&reg_base->mode, regval);
ret = spi_register_master(master);
if (ret < 0)
goto unreg_master;
dev_info(dev, "at 0x%p (irq = %d)\n", reg_base, mpc8xxx_spi->irq);
return master;
unreg_master:
free_irq(mpc8xxx_spi->irq, mpc8xxx_spi);
free_irq:
iounmap(mpc8xxx_spi->reg_base);
err_probe:
spi_master_put(master);
err:
return ERR_PTR(ret);
}
static int of_fsl_espi_get_chipselects(struct device *dev)
{
struct device_node *np = dev->of_node;
struct fsl_spi_platform_data *pdata = dev->platform_data;
const u32 *prop;
int len;
prop = of_get_property(np, "fsl,espi-num-chipselects", &len);
if (!prop || len < sizeof(*prop)) {
dev_err(dev, "No 'fsl,espi-num-chipselects' property\n");
return -EINVAL;
}
pdata->max_chipselect = *prop;
pdata->cs_control = NULL;
return 0;
}
static int __devinit of_fsl_espi_probe(struct platform_device *ofdev,
const struct of_device_id *ofid)
{
struct device *dev = &ofdev->dev;
struct device_node *np = ofdev->dev.of_node;
struct spi_master *master;
struct resource mem;
struct resource irq;
int ret = -ENOMEM;
ret = of_mpc8xxx_spi_probe(ofdev, ofid);
if (ret)
return ret;
ret = of_fsl_espi_get_chipselects(dev);
if (ret)
goto err;
ret = of_address_to_resource(np, 0, &mem);
if (ret)
goto err;
ret = of_irq_to_resource(np, 0, &irq);
if (!ret) {
ret = -EINVAL;
goto err;
}
master = fsl_espi_probe(dev, &mem, irq.start);
if (IS_ERR(master)) {
ret = PTR_ERR(master);
goto err;
}
return 0;
err:
return ret;
}
static int __devexit of_fsl_espi_remove(struct platform_device *dev)
{
return mpc8xxx_spi_remove(&dev->dev);
}
static const struct of_device_id of_fsl_espi_match[] = {
{ .compatible = "fsl,mpc8536-espi" },
{}
};
MODULE_DEVICE_TABLE(of, of_fsl_espi_match);
static struct of_platform_driver fsl_espi_driver = {
.driver = {
.name = "fsl_espi",
.owner = THIS_MODULE,
.of_match_table = of_fsl_espi_match,
},
.probe = of_fsl_espi_probe,
.remove = __devexit_p(of_fsl_espi_remove),
};
static int __init fsl_espi_init(void)
{
return of_register_platform_driver(&fsl_espi_driver);
}
module_init(fsl_espi_init);
static void __exit fsl_espi_exit(void)
{
of_unregister_platform_driver(&fsl_espi_driver);
}
module_exit(fsl_espi_exit);
MODULE_AUTHOR("Mingkai Hu");
MODULE_DESCRIPTION("Enhanced Freescale SPI Driver");
MODULE_LICENSE("GPL");

237
drivers/spi/spi_fsl_lib.c Normal file
View File

@ -0,0 +1,237 @@
/*
* Freescale SPI/eSPI controller driver library.
*
* Maintainer: Kumar Gala
*
* Copyright (C) 2006 Polycom, Inc.
*
* CPM SPI and QE buffer descriptors mode support:
* Copyright (c) 2009 MontaVista Software, Inc.
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
* Copyright 2010 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/fsl_devices.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/of_platform.h>
#include <linux/of_spi.h>
#include <sysdev/fsl_soc.h>
#include "spi_fsl_lib.h"
#define MPC8XXX_SPI_RX_BUF(type) \
void mpc8xxx_spi_rx_buf_##type(u32 data, struct mpc8xxx_spi *mpc8xxx_spi) \
{ \
type *rx = mpc8xxx_spi->rx; \
*rx++ = (type)(data >> mpc8xxx_spi->rx_shift); \
mpc8xxx_spi->rx = rx; \
}
#define MPC8XXX_SPI_TX_BUF(type) \
u32 mpc8xxx_spi_tx_buf_##type(struct mpc8xxx_spi *mpc8xxx_spi) \
{ \
u32 data; \
const type *tx = mpc8xxx_spi->tx; \
if (!tx) \
return 0; \
data = *tx++ << mpc8xxx_spi->tx_shift; \
mpc8xxx_spi->tx = tx; \
return data; \
}
MPC8XXX_SPI_RX_BUF(u8)
MPC8XXX_SPI_RX_BUF(u16)
MPC8XXX_SPI_RX_BUF(u32)
MPC8XXX_SPI_TX_BUF(u8)
MPC8XXX_SPI_TX_BUF(u16)
MPC8XXX_SPI_TX_BUF(u32)
struct mpc8xxx_spi_probe_info *to_of_pinfo(struct fsl_spi_platform_data *pdata)
{
return container_of(pdata, struct mpc8xxx_spi_probe_info, pdata);
}
void mpc8xxx_spi_work(struct work_struct *work)
{
struct mpc8xxx_spi *mpc8xxx_spi = container_of(work, struct mpc8xxx_spi,
work);
spin_lock_irq(&mpc8xxx_spi->lock);
while (!list_empty(&mpc8xxx_spi->queue)) {
struct spi_message *m = container_of(mpc8xxx_spi->queue.next,
struct spi_message, queue);
list_del_init(&m->queue);
spin_unlock_irq(&mpc8xxx_spi->lock);
if (mpc8xxx_spi->spi_do_one_msg)
mpc8xxx_spi->spi_do_one_msg(m);
spin_lock_irq(&mpc8xxx_spi->lock);
}
spin_unlock_irq(&mpc8xxx_spi->lock);
}
int mpc8xxx_spi_transfer(struct spi_device *spi,
struct spi_message *m)
{
struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
unsigned long flags;
m->actual_length = 0;
m->status = -EINPROGRESS;
spin_lock_irqsave(&mpc8xxx_spi->lock, flags);
list_add_tail(&m->queue, &mpc8xxx_spi->queue);
queue_work(mpc8xxx_spi->workqueue, &mpc8xxx_spi->work);
spin_unlock_irqrestore(&mpc8xxx_spi->lock, flags);
return 0;
}
void mpc8xxx_spi_cleanup(struct spi_device *spi)
{
kfree(spi->controller_state);
}
const char *mpc8xxx_spi_strmode(unsigned int flags)
{
if (flags & SPI_QE_CPU_MODE) {
return "QE CPU";
} else if (flags & SPI_CPM_MODE) {
if (flags & SPI_QE)
return "QE";
else if (flags & SPI_CPM2)
return "CPM2";
else
return "CPM1";
}
return "CPU";
}
int mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
unsigned int irq)
{
struct fsl_spi_platform_data *pdata = dev->platform_data;
struct spi_master *master;
struct mpc8xxx_spi *mpc8xxx_spi;
int ret = 0;
master = dev_get_drvdata(dev);
/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH
| SPI_LSB_FIRST | SPI_LOOP;
master->transfer = mpc8xxx_spi_transfer;
master->cleanup = mpc8xxx_spi_cleanup;
master->dev.of_node = dev->of_node;
mpc8xxx_spi = spi_master_get_devdata(master);
mpc8xxx_spi->dev = dev;
mpc8xxx_spi->get_rx = mpc8xxx_spi_rx_buf_u8;
mpc8xxx_spi->get_tx = mpc8xxx_spi_tx_buf_u8;
mpc8xxx_spi->flags = pdata->flags;
mpc8xxx_spi->spibrg = pdata->sysclk;
mpc8xxx_spi->irq = irq;
mpc8xxx_spi->rx_shift = 0;
mpc8xxx_spi->tx_shift = 0;
init_completion(&mpc8xxx_spi->done);
master->bus_num = pdata->bus_num;
master->num_chipselect = pdata->max_chipselect;
spin_lock_init(&mpc8xxx_spi->lock);
init_completion(&mpc8xxx_spi->done);
INIT_WORK(&mpc8xxx_spi->work, mpc8xxx_spi_work);
INIT_LIST_HEAD(&mpc8xxx_spi->queue);
mpc8xxx_spi->workqueue = create_singlethread_workqueue(
dev_name(master->dev.parent));
if (mpc8xxx_spi->workqueue == NULL) {
ret = -EBUSY;
goto err;
}
return 0;
err:
return ret;
}
int __devexit mpc8xxx_spi_remove(struct device *dev)
{
struct mpc8xxx_spi *mpc8xxx_spi;
struct spi_master *master;
master = dev_get_drvdata(dev);
mpc8xxx_spi = spi_master_get_devdata(master);
flush_workqueue(mpc8xxx_spi->workqueue);
destroy_workqueue(mpc8xxx_spi->workqueue);
spi_unregister_master(master);
free_irq(mpc8xxx_spi->irq, mpc8xxx_spi);
if (mpc8xxx_spi->spi_remove)
mpc8xxx_spi->spi_remove(mpc8xxx_spi);
return 0;
}
int __devinit of_mpc8xxx_spi_probe(struct platform_device *ofdev,
const struct of_device_id *ofid)
{
struct device *dev = &ofdev->dev;
struct device_node *np = ofdev->dev.of_node;
struct mpc8xxx_spi_probe_info *pinfo;
struct fsl_spi_platform_data *pdata;
const void *prop;
int ret = -ENOMEM;
pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
if (!pinfo)
return -ENOMEM;
pdata = &pinfo->pdata;
dev->platform_data = pdata;
/* Allocate bus num dynamically. */
pdata->bus_num = -1;
/* SPI controller is either clocked from QE or SoC clock. */
pdata->sysclk = get_brgfreq();
if (pdata->sysclk == -1) {
pdata->sysclk = fsl_get_sys_freq();
if (pdata->sysclk == -1) {
ret = -ENODEV;
goto err;
}
}
prop = of_get_property(np, "mode", NULL);
if (prop && !strcmp(prop, "cpu-qe"))
pdata->flags = SPI_QE_CPU_MODE;
else if (prop && !strcmp(prop, "qe"))
pdata->flags = SPI_CPM_MODE | SPI_QE;
else if (of_device_is_compatible(np, "fsl,cpm2-spi"))
pdata->flags = SPI_CPM_MODE | SPI_CPM2;
else if (of_device_is_compatible(np, "fsl,cpm1-spi"))
pdata->flags = SPI_CPM_MODE | SPI_CPM1;
return 0;
err:
kfree(pinfo);
return ret;
}

124
drivers/spi/spi_fsl_lib.h Normal file
View File

@ -0,0 +1,124 @@
/*
* Freescale SPI/eSPI controller driver library.
*
* Maintainer: Kumar Gala
*
* Copyright 2010 Freescale Semiconductor, Inc.
* Copyright (C) 2006 Polycom, Inc.
*
* CPM SPI and QE buffer descriptors mode support:
* Copyright (c) 2009 MontaVista Software, Inc.
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#ifndef __SPI_FSL_LIB_H__
#define __SPI_FSL_LIB_H__
#include <asm/io.h>
/* SPI/eSPI Controller driver's private data. */
struct mpc8xxx_spi {
struct device *dev;
void *reg_base;
/* rx & tx bufs from the spi_transfer */
const void *tx;
void *rx;
#ifdef CONFIG_SPI_FSL_ESPI
int len;
#endif
int subblock;
struct spi_pram __iomem *pram;
struct cpm_buf_desc __iomem *tx_bd;
struct cpm_buf_desc __iomem *rx_bd;
struct spi_transfer *xfer_in_progress;
/* dma addresses for CPM transfers */
dma_addr_t tx_dma;
dma_addr_t rx_dma;
bool map_tx_dma;
bool map_rx_dma;
dma_addr_t dma_dummy_tx;
dma_addr_t dma_dummy_rx;
/* functions to deal with different sized buffers */
void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
u32(*get_tx) (struct mpc8xxx_spi *);
/* hooks for different controller driver */
void (*spi_do_one_msg) (struct spi_message *m);
void (*spi_remove) (struct mpc8xxx_spi *mspi);
unsigned int count;
unsigned int irq;
unsigned nsecs; /* (clock cycle time)/2 */
u32 spibrg; /* SPIBRG input clock */
u32 rx_shift; /* RX data reg shift when in qe mode */
u32 tx_shift; /* TX data reg shift when in qe mode */
unsigned int flags;
struct workqueue_struct *workqueue;
struct work_struct work;
struct list_head queue;
spinlock_t lock;
struct completion done;
};
struct spi_mpc8xxx_cs {
/* functions to deal with different sized buffers */
void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *);
u32 (*get_tx) (struct mpc8xxx_spi *);
u32 rx_shift; /* RX data reg shift when in qe mode */
u32 tx_shift; /* TX data reg shift when in qe mode */
u32 hw_mode; /* Holds HW mode register settings */
};
static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val)
{
out_be32(reg, val);
}
static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg)
{
return in_be32(reg);
}
struct mpc8xxx_spi_probe_info {
struct fsl_spi_platform_data pdata;
int *gpios;
bool *alow_flags;
};
extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi);
extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi);
extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi);
extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi);
extern struct mpc8xxx_spi_probe_info *to_of_pinfo(
struct fsl_spi_platform_data *pdata);
extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi,
struct spi_transfer *t, unsigned int len);
extern int mpc8xxx_spi_transfer(struct spi_device *spi, struct spi_message *m);
extern void mpc8xxx_spi_cleanup(struct spi_device *spi);
extern const char *mpc8xxx_spi_strmode(unsigned int flags);
extern int mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
unsigned int irq);
extern int mpc8xxx_spi_remove(struct device *dev);
extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev,
const struct of_device_id *ofid);
#endif /* __SPI_FSL_LIB_H__ */

552
drivers/spi/spi_mpc8xxx.c → drivers/spi/spi_fsl_spi.c
View File

File diff suppressed because it is too large Load Diff

152
drivers/spi/spi_s3c64xx.c
View File

@ -261,15 +261,25 @@ static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
chcfg |= S3C64XX_SPI_CH_TXCH_ON;
if (dma_mode) {
modecfg |= S3C64XX_SPI_MODE_TXDMA_ON;
s3c2410_dma_config(sdd->tx_dmach, 1);
s3c2410_dma_config(sdd->tx_dmach, sdd->cur_bpw / 8);
s3c2410_dma_enqueue(sdd->tx_dmach, (void *)sdd,
xfer->tx_dma, xfer->len);
s3c2410_dma_ctrl(sdd->tx_dmach, S3C2410_DMAOP_START);
} else {
unsigned char *buf = (unsigned char *) xfer->tx_buf;
int i = 0;
while (i < xfer->len)
writeb(buf[i++], regs + S3C64XX_SPI_TX_DATA);
switch (sdd->cur_bpw) {
case 32:
iowrite32_rep(regs + S3C64XX_SPI_TX_DATA,
xfer->tx_buf, xfer->len / 4);
break;
case 16:
iowrite16_rep(regs + S3C64XX_SPI_TX_DATA,
xfer->tx_buf, xfer->len / 2);
break;
default:
iowrite8_rep(regs + S3C64XX_SPI_TX_DATA,
xfer->tx_buf, xfer->len);
break;
}
}
}
@ -286,7 +296,7 @@ static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
writel(((xfer->len * 8 / sdd->cur_bpw) & 0xffff)
| S3C64XX_SPI_PACKET_CNT_EN,
regs + S3C64XX_SPI_PACKET_CNT);
s3c2410_dma_config(sdd->rx_dmach, 1);
s3c2410_dma_config(sdd->rx_dmach, sdd->cur_bpw / 8);
s3c2410_dma_enqueue(sdd->rx_dmach, (void *)sdd,
xfer->rx_dma, xfer->len);
s3c2410_dma_ctrl(sdd->rx_dmach, S3C2410_DMAOP_START);
@ -366,20 +376,26 @@ static int wait_for_xfer(struct s3c64xx_spi_driver_data *sdd,
return -EIO;
}
} else {
unsigned char *buf;
int i;
/* If it was only Tx */
if (xfer->rx_buf == NULL) {
sdd->state &= ~TXBUSY;
return 0;
}
i = 0;
buf = xfer->rx_buf;
while (i < xfer->len)
buf[i++] = readb(regs + S3C64XX_SPI_RX_DATA);
switch (sdd->cur_bpw) {
case 32:
ioread32_rep(regs + S3C64XX_SPI_RX_DATA,
xfer->rx_buf, xfer->len / 4);
break;
case 16:
ioread16_rep(regs + S3C64XX_SPI_RX_DATA,
xfer->rx_buf, xfer->len / 2);
break;
default:
ioread8_rep(regs + S3C64XX_SPI_RX_DATA,
xfer->rx_buf, xfer->len);
break;
}
sdd->state &= ~RXBUSY;
}
@ -399,13 +415,18 @@ static inline void disable_cs(struct s3c64xx_spi_driver_data *sdd,
static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
{
struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
void __iomem *regs = sdd->regs;
u32 val;
/* Disable Clock */
val = readl(regs + S3C64XX_SPI_CLK_CFG);
val &= ~S3C64XX_SPI_ENCLK_ENABLE;
writel(val, regs + S3C64XX_SPI_CLK_CFG);
if (sci->clk_from_cmu) {
clk_disable(sdd->src_clk);
} else {
val = readl(regs + S3C64XX_SPI_CLK_CFG);
val &= ~S3C64XX_SPI_ENCLK_ENABLE;
writel(val, regs + S3C64XX_SPI_CLK_CFG);
}
/* Set Polarity and Phase */
val = readl(regs + S3C64XX_SPI_CH_CFG);
@ -429,29 +450,39 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
switch (sdd->cur_bpw) {
case 32:
val |= S3C64XX_SPI_MODE_BUS_TSZ_WORD;
val |= S3C64XX_SPI_MODE_CH_TSZ_WORD;
break;
case 16:
val |= S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD;
val |= S3C64XX_SPI_MODE_CH_TSZ_HALFWORD;
break;
default:
val |= S3C64XX_SPI_MODE_BUS_TSZ_BYTE;
val |= S3C64XX_SPI_MODE_CH_TSZ_BYTE;
break;
}
val |= S3C64XX_SPI_MODE_CH_TSZ_BYTE; /* Always 8bits wide */
writel(val, regs + S3C64XX_SPI_MODE_CFG);
/* Configure Clock */
val = readl(regs + S3C64XX_SPI_CLK_CFG);
val &= ~S3C64XX_SPI_PSR_MASK;
val |= ((clk_get_rate(sdd->src_clk) / sdd->cur_speed / 2 - 1)
& S3C64XX_SPI_PSR_MASK);
writel(val, regs + S3C64XX_SPI_CLK_CFG);
if (sci->clk_from_cmu) {
/* Configure Clock */
/* There is half-multiplier before the SPI */
clk_set_rate(sdd->src_clk, sdd->cur_speed * 2);
/* Enable Clock */
clk_enable(sdd->src_clk);
} else {
/* Configure Clock */
val = readl(regs + S3C64XX_SPI_CLK_CFG);
val &= ~S3C64XX_SPI_PSR_MASK;
val |= ((clk_get_rate(sdd->src_clk) / sdd->cur_speed / 2 - 1)
& S3C64XX_SPI_PSR_MASK);
writel(val, regs + S3C64XX_SPI_CLK_CFG);
/* Enable Clock */
val = readl(regs + S3C64XX_SPI_CLK_CFG);
val |= S3C64XX_SPI_ENCLK_ENABLE;
writel(val, regs + S3C64XX_SPI_CLK_CFG);
/* Enable Clock */
val = readl(regs + S3C64XX_SPI_CLK_CFG);
val |= S3C64XX_SPI_ENCLK_ENABLE;
writel(val, regs + S3C64XX_SPI_CLK_CFG);
}
}
static void s3c64xx_spi_dma_rxcb(struct s3c2410_dma_chan *chan, void *buf_id,
@ -499,6 +530,7 @@ static void s3c64xx_spi_dma_txcb(struct s3c2410_dma_chan *chan, void *buf_id,
static int s3c64xx_spi_map_mssg(struct s3c64xx_spi_driver_data *sdd,
struct spi_message *msg)
{
struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
struct device *dev = &sdd->pdev->dev;
struct spi_transfer *xfer;
@ -514,6 +546,9 @@ static int s3c64xx_spi_map_mssg(struct s3c64xx_spi_driver_data *sdd,
/* Map until end or first fail */
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
if (xfer->len <= ((sci->fifo_lvl_mask >> 1) + 1))
continue;
if (xfer->tx_buf != NULL) {
xfer->tx_dma = dma_map_single(dev,
(void *)xfer->tx_buf, xfer->len,
@ -545,6 +580,7 @@ static int s3c64xx_spi_map_mssg(struct s3c64xx_spi_driver_data *sdd,
static void s3c64xx_spi_unmap_mssg(struct s3c64xx_spi_driver_data *sdd,
struct spi_message *msg)
{
struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
struct device *dev = &sdd->pdev->dev;
struct spi_transfer *xfer;
@ -553,6 +589,9 @@ static void s3c64xx_spi_unmap_mssg(struct s3c64xx_spi_driver_data *sdd,
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
if (xfer->len <= ((sci->fifo_lvl_mask >> 1) + 1))
continue;
if (xfer->rx_buf != NULL
&& xfer->rx_dma != XFER_DMAADDR_INVALID)
dma_unmap_single(dev, xfer->rx_dma,
@ -608,6 +647,14 @@ static void handle_msg(struct s3c64xx_spi_driver_data *sdd,
bpw = xfer->bits_per_word ? : spi->bits_per_word;
speed = xfer->speed_hz ? : spi->max_speed_hz;
if (xfer->len % (bpw / 8)) {
dev_err(&spi->dev,
"Xfer length(%u) not a multiple of word size(%u)\n",
xfer->len, bpw / 8);
status = -EIO;
goto out;
}
if (bpw != sdd->cur_bpw || speed != sdd->cur_speed) {
sdd->cur_bpw = bpw;
sdd->cur_speed = speed;
@ -798,7 +845,6 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
struct s3c64xx_spi_driver_data *sdd;
struct s3c64xx_spi_info *sci;
struct spi_message *msg;
u32 psr, speed;
unsigned long flags;
int err = 0;
@ -841,31 +887,36 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
}
/* Check if we can provide the requested rate */
speed = clk_get_rate(sdd->src_clk) / 2 / (0 + 1); /* Max possible */
if (!sci->clk_from_cmu) {
u32 psr, speed;
if (spi->max_speed_hz > speed)
spi->max_speed_hz = speed;
/* Max possible */
speed = clk_get_rate(sdd->src_clk) / 2 / (0 + 1);
psr = clk_get_rate(sdd->src_clk) / 2 / spi->max_speed_hz - 1;
psr &= S3C64XX_SPI_PSR_MASK;
if (psr == S3C64XX_SPI_PSR_MASK)
psr--;
if (spi->max_speed_hz > speed)
spi->max_speed_hz = speed;
speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
if (spi->max_speed_hz < speed) {
if (psr+1 < S3C64XX_SPI_PSR_MASK) {
psr++;
} else {
err = -EINVAL;
goto setup_exit;
psr = clk_get_rate(sdd->src_clk) / 2 / spi->max_speed_hz - 1;
psr &= S3C64XX_SPI_PSR_MASK;
if (psr == S3C64XX_SPI_PSR_MASK)
psr--;
speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
if (spi->max_speed_hz < speed) {
if (psr+1 < S3C64XX_SPI_PSR_MASK) {
psr++;
} else {
err = -EINVAL;
goto setup_exit;
}
}
}
speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
if (spi->max_speed_hz >= speed)
spi->max_speed_hz = speed;
else
err = -EINVAL;
speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
if (spi->max_speed_hz >= speed)
spi->max_speed_hz = speed;
else
err = -EINVAL;
}
setup_exit:
@ -888,7 +939,8 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel)
/* Disable Interrupts - we use Polling if not DMA mode */
writel(0, regs + S3C64XX_SPI_INT_EN);
writel(sci->src_clk_nr << S3C64XX_SPI_CLKSEL_SRCSHFT,
if (!sci->clk_from_cmu)
writel(sci->src_clk_nr << S3C64XX_SPI_CLKSEL_SRCSHFT,
regs + S3C64XX_SPI_CLK_CFG);
writel(0, regs + S3C64XX_SPI_MODE_CFG);
writel(0, regs + S3C64XX_SPI_PACKET_CNT);

1303
drivers/spi/spi_topcliff_pch.c Normal file
View File

File diff suppressed because it is too large Load Diff

13
include/linux/amba/pl022.h
View File

@ -228,6 +228,7 @@ enum ssp_chip_select {
};
struct dma_chan;
/**
* struct pl022_ssp_master - device.platform_data for SPI controller devices.
* @num_chipselect: chipselects are used to distinguish individual
@ -235,11 +236,16 @@ enum ssp_chip_select {
* each slave has a chipselect signal, but it's common that not
* every chipselect is connected to a slave.
* @enable_dma: if true enables DMA driven transfers.
* @dma_rx_param: parameter to locate an RX DMA channel.
* @dma_tx_param: parameter to locate a TX DMA channel.
*/
struct pl022_ssp_controller {
u16 bus_id;
u8 num_chipselect;
u8 enable_dma:1;
bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
void *dma_rx_param;
void *dma_tx_param;
};
/**
@ -270,20 +276,13 @@ struct pl022_ssp_controller {
* @dma_config: DMA configuration for SSP controller and peripheral
*/
struct pl022_config_chip {
struct device *dev;
enum ssp_loopback lbm;
enum ssp_interface iface;
enum ssp_hierarchy hierarchy;
bool slave_tx_disable;
struct ssp_clock_params clk_freq;
enum ssp_rx_endian endian_rx;
enum ssp_tx_endian endian_tx;
enum ssp_data_size data_size;
enum ssp_mode com_mode;
enum ssp_rx_level_trig rx_lev_trig;
enum ssp_tx_level_trig tx_lev_trig;
enum ssp_spi_clk_phase clk_phase;
enum ssp_spi_clk_pol clk_pol;
enum ssp_microwire_ctrl_len ctrl_len;
enum ssp_microwire_wait_state wait_state;
enum ssp_duplex duplex;