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spi : convert altera_spi to driver model
Convert altera_spi to driver model Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Reviewed-by: Jagan Teki <jteki@openedev.com>
This commit is contained in:
Thomas Chou
parent
da2f838d8a
commit
15a56f9cb7
4
doc/device-tree-bindings/spi/spi_altera.txt
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4
doc/device-tree-bindings/spi/spi_altera.txt
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@ -0,0 +1,4 @@
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Altera SPI
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Required properties:
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- compatible : should be "altr,spi-1.0".
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@ -15,6 +15,14 @@ config DM_SPI
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if DM_SPI
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config ALTERA_SPI
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bool "Altera SPI driver"
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help
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Enable the Altera SPI driver. This driver can be used to
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access the SPI NOR flash on platforms embedding this Altera
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IP core. Please find details on the "Embedded Peripherals IP
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User Guide" of Altera.
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config CADENCE_QSPI
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bool "Cadence QSPI driver"
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help
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@ -8,18 +8,19 @@
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <dm.h>
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#include <errno.h>
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#include <malloc.h>
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#include <spi.h>
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#include <fdtdec.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifndef CONFIG_ALTERA_SPI_IDLE_VAL
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#define CONFIG_ALTERA_SPI_IDLE_VAL 0xff
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#endif
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#ifndef CONFIG_SYS_ALTERA_SPI_LIST
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#define CONFIG_SYS_ALTERA_SPI_LIST { CONFIG_SYS_SPI_BASE }
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#endif
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struct altera_spi_regs {
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u32 rxdata;
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u32 txdata;
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@ -29,102 +30,68 @@ struct altera_spi_regs {
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u32 slave_sel;
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};
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#define ALTERA_SPI_STATUS_ROE_MSK (1 << 3)
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#define ALTERA_SPI_STATUS_TOE_MSK (1 << 4)
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#define ALTERA_SPI_STATUS_TMT_MSK (1 << 5)
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#define ALTERA_SPI_STATUS_TRDY_MSK (1 << 6)
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#define ALTERA_SPI_STATUS_RRDY_MSK (1 << 7)
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#define ALTERA_SPI_STATUS_E_MSK (1 << 8)
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struct altera_spi_platdata {
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struct altera_spi_regs *regs;
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};
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#define ALTERA_SPI_CONTROL_IROE_MSK (1 << 3)
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#define ALTERA_SPI_CONTROL_ITOE_MSK (1 << 4)
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#define ALTERA_SPI_CONTROL_ITRDY_MSK (1 << 6)
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#define ALTERA_SPI_CONTROL_IRRDY_MSK (1 << 7)
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#define ALTERA_SPI_CONTROL_IE_MSK (1 << 8)
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struct altera_spi_priv {
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struct altera_spi_regs *regs;
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};
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#define ALTERA_SPI_STATUS_RRDY_MSK (1 << 7)
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#define ALTERA_SPI_CONTROL_SSO_MSK (1 << 10)
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static ulong altera_spi_base_list[] = CONFIG_SYS_ALTERA_SPI_LIST;
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struct altera_spi_slave {
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struct spi_slave slave;
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struct altera_spi_regs *regs;
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};
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#define to_altera_spi_slave(s) container_of(s, struct altera_spi_slave, slave)
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__weak int spi_cs_is_valid(unsigned int bus, unsigned int cs)
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static void spi_cs_activate(struct udevice *dev, uint cs)
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{
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return bus < ARRAY_SIZE(altera_spi_base_list) && cs < 32;
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struct udevice *bus = dev->parent;
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struct altera_spi_priv *priv = dev_get_priv(bus);
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struct altera_spi_regs *const regs = priv->regs;
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writel(1 << cs, ®s->slave_sel);
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writel(ALTERA_SPI_CONTROL_SSO_MSK, ®s->control);
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}
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__weak void spi_cs_activate(struct spi_slave *slave)
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static void spi_cs_deactivate(struct udevice *dev)
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{
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struct altera_spi_slave *altspi = to_altera_spi_slave(slave);
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writel(1 << slave->cs, &altspi->regs->slave_sel);
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writel(ALTERA_SPI_CONTROL_SSO_MSK, &altspi->regs->control);
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struct udevice *bus = dev->parent;
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struct altera_spi_priv *priv = dev_get_priv(bus);
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struct altera_spi_regs *const regs = priv->regs;
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writel(0, ®s->control);
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writel(0, ®s->slave_sel);
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}
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__weak void spi_cs_deactivate(struct spi_slave *slave)
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static int altera_spi_claim_bus(struct udevice *dev)
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{
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struct altera_spi_slave *altspi = to_altera_spi_slave(slave);
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writel(0, &altspi->regs->control);
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writel(0, &altspi->regs->slave_sel);
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}
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struct udevice *bus = dev->parent;
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struct altera_spi_priv *priv = dev_get_priv(bus);
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struct altera_spi_regs *const regs = priv->regs;
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void spi_init(void)
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{
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}
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writel(0, ®s->control);
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writel(0, ®s->slave_sel);
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void spi_set_speed(struct spi_slave *slave, uint hz)
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{
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/* altera spi core does not support programmable speed */
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}
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struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
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unsigned int max_hz, unsigned int mode)
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{
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struct altera_spi_slave *altspi;
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if (!spi_cs_is_valid(bus, cs))
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return NULL;
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altspi = spi_alloc_slave(struct altera_spi_slave, bus, cs);
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if (!altspi)
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return NULL;
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altspi->regs = (struct altera_spi_regs *)altera_spi_base_list[bus];
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debug("%s: bus:%i cs:%i base:%p\n", __func__, bus, cs, altspi->regs);
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return &altspi->slave;
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}
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void spi_free_slave(struct spi_slave *slave)
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{
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struct altera_spi_slave *altspi = to_altera_spi_slave(slave);
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free(altspi);
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}
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int spi_claim_bus(struct spi_slave *slave)
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{
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struct altera_spi_slave *altspi = to_altera_spi_slave(slave);
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debug("%s: bus:%i cs:%i\n", __func__, slave->bus, slave->cs);
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writel(0, &altspi->regs->control);
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writel(0, &altspi->regs->slave_sel);
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return 0;
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}
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void spi_release_bus(struct spi_slave *slave)
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static int altera_spi_release_bus(struct udevice *dev)
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{
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struct altera_spi_slave *altspi = to_altera_spi_slave(slave);
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struct udevice *bus = dev->parent;
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struct altera_spi_priv *priv = dev_get_priv(bus);
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struct altera_spi_regs *const regs = priv->regs;
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debug("%s: bus:%i cs:%i\n", __func__, slave->bus, slave->cs);
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writel(0, &altspi->regs->slave_sel);
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writel(0, ®s->slave_sel);
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return 0;
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}
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int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
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void *din, unsigned long flags)
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static int altera_spi_xfer(struct udevice *dev, unsigned int bitlen,
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const void *dout, void *din, unsigned long flags)
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{
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struct altera_spi_slave *altspi = to_altera_spi_slave(slave);
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struct udevice *bus = dev->parent;
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struct altera_spi_priv *priv = dev_get_priv(bus);
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struct altera_spi_regs *const regs = priv->regs;
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struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
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/* assume spi core configured to do 8 bit transfers */
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unsigned int bytes = bitlen / 8;
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const unsigned char *txp = dout;
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@ -132,7 +99,7 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
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uint32_t reg, data, start;
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debug("%s: bus:%i cs:%i bitlen:%i bytes:%i flags:%lx\n", __func__,
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slave->bus, slave->cs, bitlen, bytes, flags);
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bus->seq, slave_plat->cs, bitlen, bytes, flags);
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if (bitlen == 0)
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goto done;
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@ -143,11 +110,11 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
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}
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/* empty read buffer */
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if (readl(&altspi->regs->status) & ALTERA_SPI_STATUS_RRDY_MSK)
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readl(&altspi->regs->rxdata);
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if (readl(®s->status) & ALTERA_SPI_STATUS_RRDY_MSK)
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readl(®s->rxdata);
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if (flags & SPI_XFER_BEGIN)
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spi_cs_activate(slave);
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spi_cs_activate(dev, slave_plat->cs);
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while (bytes--) {
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if (txp)
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@ -156,20 +123,20 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
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data = CONFIG_ALTERA_SPI_IDLE_VAL;
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debug("%s: tx:%x ", __func__, data);
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writel(data, &altspi->regs->txdata);
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writel(data, ®s->txdata);
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start = get_timer(0);
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while (1) {
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reg = readl(&altspi->regs->status);
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reg = readl(®s->status);
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if (reg & ALTERA_SPI_STATUS_RRDY_MSK)
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break;
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if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
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printf("%s: Transmission timed out!\n", __func__);
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goto done;
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debug("%s: Transmission timed out!\n", __func__);
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return -1;
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}
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}
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data = readl(&altspi->regs->rxdata);
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data = readl(®s->rxdata);
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if (rxp)
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*rxp++ = data & 0xff;
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@ -178,7 +145,65 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
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done:
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if (flags & SPI_XFER_END)
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spi_cs_deactivate(slave);
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spi_cs_deactivate(dev);
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return 0;
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}
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static int altera_spi_set_speed(struct udevice *bus, uint speed)
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{
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return 0;
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}
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static int altera_spi_set_mode(struct udevice *bus, uint mode)
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{
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return 0;
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}
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static int altera_spi_probe(struct udevice *bus)
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{
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struct altera_spi_platdata *plat = dev_get_platdata(bus);
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struct altera_spi_priv *priv = dev_get_priv(bus);
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priv->regs = plat->regs;
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return 0;
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}
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static int altera_spi_ofdata_to_platdata(struct udevice *bus)
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{
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struct altera_spi_platdata *plat = dev_get_platdata(bus);
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plat->regs = ioremap(dev_get_addr(bus),
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sizeof(struct altera_spi_regs));
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return 0;
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}
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static const struct dm_spi_ops altera_spi_ops = {
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.claim_bus = altera_spi_claim_bus,
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.release_bus = altera_spi_release_bus,
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.xfer = altera_spi_xfer,
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.set_speed = altera_spi_set_speed,
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.set_mode = altera_spi_set_mode,
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/*
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* cs_info is not needed, since we require all chip selects to be
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* in the device tree explicitly
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*/
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};
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static const struct udevice_id altera_spi_ids[] = {
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{ .compatible = "altr,spi-1.0", },
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{ }
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};
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U_BOOT_DRIVER(altera_spi) = {
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.name = "altera_spi",
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.id = UCLASS_SPI,
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.of_match = altera_spi_ids,
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.ops = &altera_spi_ops,
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.ofdata_to_platdata = altera_spi_ofdata_to_platdata,
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.platdata_auto_alloc_size = sizeof(struct altera_spi_platdata),
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.priv_auto_alloc_size = sizeof(struct altera_spi_priv),
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.probe = altera_spi_probe,
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};
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