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[PATCH] ppc32 CPM_UART: Convert to use platform devices

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This is intended to make the driver code more generic and flexible,
to get rid of board-specific layouts within driver, and generic rehaul,
yet keeping compatibility with the existing stuff utilizing it, being
compatible with legacy behavior (but with complaints that legacy mode
used).

Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Vitaly Bordug 2006-04-25 20:26:41 +04:00 committed by Paul Mackerras
parent a73c87bfe9
commit e27987cddd
4 changed files with 225 additions and 116 deletions
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16
drivers/serial/cpm_uart/cpm_uart.h
View File

@ -10,6 +10,8 @@
#define CPM_UART_H
#include <linux/config.h>
#include <linux/platform_device.h>
#include <linux/fs_uart_pd.h>
#if defined(CONFIG_CPM2)
#include "cpm_uart_cpm2.h"
@ -26,14 +28,14 @@
#define FLAG_SMC 0x00000002
#define FLAG_CONSOLE 0x00000001
#define UART_SMC1 0
#define UART_SMC2 1
#define UART_SCC1 2
#define UART_SCC2 3
#define UART_SCC3 4
#define UART_SCC4 5
#define UART_SMC1 fsid_smc1_uart
#define UART_SMC2 fsid_smc2_uart
#define UART_SCC1 fsid_scc1_uart
#define UART_SCC2 fsid_scc2_uart
#define UART_SCC3 fsid_scc3_uart
#define UART_SCC4 fsid_scc4_uart
#define UART_NR 6
#define UART_NR fs_uart_nr
#define RX_NUM_FIFO 4
#define RX_BUF_SIZE 32

269
drivers/serial/cpm_uart/cpm_uart_core.c
View File

@ -41,6 +41,7 @@
#include <linux/device.h>
#include <linux/bootmem.h>
#include <linux/dma-mapping.h>
#include <linux/fs_uart_pd.h>
#include <asm/io.h>
#include <asm/irq.h>
@ -60,7 +61,7 @@
/* Track which ports are configured as uarts */
int cpm_uart_port_map[UART_NR];
/* How many ports did we config as uarts */
int cpm_uart_nr;
int cpm_uart_nr = 0;
/**************************************************************/
@ -85,6 +86,37 @@ static inline void *cpm2cpu_addr(unsigned long addr)
return bus_to_virt(addr);
}
/* Place-holder for board-specific stuff */
struct platform_device* __attribute__ ((weak)) __init
early_uart_get_pdev(int index)
{
return NULL;
}
void cpm_uart_count(void)
{
cpm_uart_nr = 0;
#ifdef CONFIG_SERIAL_CPM_SMC1
cpm_uart_port_map[cpm_uart_nr++] = UART_SMC1;
#endif
#ifdef CONFIG_SERIAL_CPM_SMC2
cpm_uart_port_map[cpm_uart_nr++] = UART_SMC2;
#endif
#ifdef CONFIG_SERIAL_CPM_SCC1
cpm_uart_port_map[cpm_uart_nr++] = UART_SCC1;
#endif
#ifdef CONFIG_SERIAL_CPM_SCC2
cpm_uart_port_map[cpm_uart_nr++] = UART_SCC2;
#endif
#ifdef CONFIG_SERIAL_CPM_SCC3
cpm_uart_port_map[cpm_uart_nr++] = UART_SCC3;
#endif
#ifdef CONFIG_SERIAL_CPM_SCC4
cpm_uart_port_map[cpm_uart_nr++] = UART_SCC4;
#endif
}
/*
* Check, if transmit buffers are processed
*/
@ -829,14 +861,6 @@ static int cpm_uart_request_port(struct uart_port *port)
if (pinfo->flags & FLAG_CONSOLE)
return 0;
/*
* Setup any port IO, connect any baud rate generators,
* etc. This is expected to be handled by board
* dependant code
*/
if (pinfo->set_lineif)
pinfo->set_lineif(pinfo);
if (IS_SMC(pinfo)) {
pinfo->smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
pinfo->smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
@ -988,6 +1012,54 @@ struct uart_cpm_port cpm_uart_ports[UART_NR] = {
},
};
int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con)
{
struct resource *r;
struct fs_uart_platform_info *pdata = pdev->dev.platform_data;
int idx = pdata->fs_no; /* It is UART_SMCx or UART_SCCx index */
struct uart_cpm_port *pinfo;
int line;
u32 mem, pram;
for (line=0; line<UART_NR && cpm_uart_port_map[line]!=pdata->fs_no; line++);
pinfo = (struct uart_cpm_port *) &cpm_uart_ports[idx];
pinfo->brg = pdata->brg;
if (!is_con) {
pinfo->port.line = line;
pinfo->port.flags = UPF_BOOT_AUTOCONF;
}
if (!(r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs")))
return -EINVAL;
mem = r->start;
if (!(r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pram")))
return -EINVAL;
pram = r->start;
if(idx > fsid_smc2_uart) {
pinfo->sccp = (scc_t *)mem;
pinfo->sccup = (scc_uart_t *)pram;
} else {
pinfo->smcp = (smc_t *)mem;
pinfo->smcup = (smc_uart_t *)pram;
}
pinfo->tx_nrfifos = pdata->tx_num_fifo;
pinfo->tx_fifosize = pdata->tx_buf_size;
pinfo->rx_nrfifos = pdata->rx_num_fifo;
pinfo->rx_fifosize = pdata->rx_buf_size;
pinfo->port.uartclk = pdata->uart_clk;
pinfo->port.mapbase = (unsigned long)mem;
pinfo->port.irq = platform_get_irq(pdev, 0);
return 0;
}
#ifdef CONFIG_SERIAL_CPM_CONSOLE
/*
* Print a string to the serial port trying not to disturb
@ -1067,9 +1139,7 @@ static void cpm_uart_console_write(struct console *co, const char *s,
pinfo->tx_cur = (volatile cbd_t *) bdp;
}
/*
* Setup console. Be careful is called early !
*/
static int __init cpm_uart_console_setup(struct console *co, char *options)
{
struct uart_port *port;
@ -1080,9 +1150,27 @@ static int __init cpm_uart_console_setup(struct console *co, char *options)
int flow = 'n';
int ret;
struct fs_uart_platform_info *pdata;
struct platform_device* pdev = early_uart_get_pdev(co->index);
port =
(struct uart_port *)&cpm_uart_ports[cpm_uart_port_map[co->index]];
pinfo = (struct uart_cpm_port *)port;
if (!pdev) {
pr_info("cpm_uart: console: compat mode\n");
/* compatibility - will be cleaned up */
cpm_uart_init_portdesc();
if (pinfo->set_lineif)
pinfo->set_lineif(pinfo);
} else {
pdata = pdev->dev.platform_data;
if (pdata)
if (pdata->init_ioports)
pdata->init_ioports();
cpm_uart_drv_get_platform_data(pdev, 1);
}
pinfo->flags |= FLAG_CONSOLE;
@ -1097,14 +1185,6 @@ static int __init cpm_uart_console_setup(struct console *co, char *options)
baud = 9600;
}
/*
* Setup any port IO, connect any baud rate generators,
* etc. This is expected to be handled by board
* dependant code
*/
if (pinfo->set_lineif)
pinfo->set_lineif(pinfo);
if (IS_SMC(pinfo)) {
pinfo->smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
pinfo->smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
@ -1143,11 +1223,8 @@ static struct console cpm_scc_uart_console = {
int __init cpm_uart_console_init(void)
{
int ret = cpm_uart_init_portdesc();
if (!ret)
register_console(&cpm_scc_uart_console);
return ret;
register_console(&cpm_scc_uart_console);
return 0;
}
console_initcall(cpm_uart_console_init);
@ -1165,44 +1242,130 @@ static struct uart_driver cpm_reg = {
.minor = SERIAL_CPM_MINOR,
.cons = CPM_UART_CONSOLE,
};
static int __init cpm_uart_init(void)
static int cpm_uart_drv_probe(struct device *dev)
{
int ret, i;
struct platform_device *pdev = to_platform_device(dev);
struct fs_uart_platform_info *pdata;
int ret = -ENODEV;
printk(KERN_INFO "Serial: CPM driver $Revision: 0.01 $\n");
#ifndef CONFIG_SERIAL_CPM_CONSOLE
ret = cpm_uart_init_portdesc();
if (ret)
if(!pdev) {
printk(KERN_ERR"CPM UART: platform data missing!\n");
return ret;
#endif
cpm_reg.nr = cpm_uart_nr;
ret = uart_register_driver(&cpm_reg);
if (ret)
return ret;
for (i = 0; i < cpm_uart_nr; i++) {
int con = cpm_uart_port_map[i];
cpm_uart_ports[con].port.line = i;
cpm_uart_ports[con].port.flags = UPF_BOOT_AUTOCONF;
uart_add_one_port(&cpm_reg, &cpm_uart_ports[con].port);
}
pdata = pdev->dev.platform_data;
pr_debug("cpm_uart_drv_probe: Adding CPM UART %d\n",
cpm_uart_port_map[pdata->fs_no]);
if ((ret = cpm_uart_drv_get_platform_data(pdev, 0)))
return ret;
if (pdata->init_ioports)
pdata->init_ioports();
ret = uart_add_one_port(&cpm_reg, &cpm_uart_ports[pdata->fs_no].port);
return ret;
}
static int cpm_uart_drv_remove(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct fs_uart_platform_info *pdata = pdev->dev.platform_data;
pr_debug("cpm_uart_drv_remove: Removing CPM UART %d\n",
cpm_uart_port_map[pdata->fs_no]);
uart_remove_one_port(&cpm_reg, &cpm_uart_ports[pdata->fs_no].port);
return 0;
}
static struct device_driver cpm_smc_uart_driver = {
.name = "fsl-cpm-smc:uart",
.bus = &platform_bus_type,
.probe = cpm_uart_drv_probe,
.remove = cpm_uart_drv_remove,
};
static struct device_driver cpm_scc_uart_driver = {
.name = "fsl-cpm-scc:uart",
.bus = &platform_bus_type,
.probe = cpm_uart_drv_probe,
.remove = cpm_uart_drv_remove,
};
/*
This is supposed to match uart devices on platform bus,
*/
static int match_is_uart (struct device* dev, void* data)
{
struct platform_device* pdev = container_of(dev, struct platform_device, dev);
int ret = 0;
/* this was setfunc as uart */
if(strstr(pdev->name,":uart")) {
ret = 1;
}
return ret;
}
static int cpm_uart_init(void) {
int ret;
int i;
struct device *dev;
printk(KERN_INFO "Serial: CPM driver $Revision: 0.02 $\n");
/* lookup the bus for uart devices */
dev = bus_find_device(&platform_bus_type, NULL, 0, match_is_uart);
/* There are devices on the bus - all should be OK */
if (dev) {
cpm_uart_count();
cpm_reg.nr = cpm_uart_nr;
if (!(ret = uart_register_driver(&cpm_reg))) {
if ((ret = driver_register(&cpm_smc_uart_driver))) {
uart_unregister_driver(&cpm_reg);
return ret;
}
if ((ret = driver_register(&cpm_scc_uart_driver))) {
driver_unregister(&cpm_scc_uart_driver);
uart_unregister_driver(&cpm_reg);
}
}
} else {
/* No capable platform devices found - falling back to legacy mode */
pr_info("cpm_uart: WARNING: no UART devices found on platform bus!\n");
pr_info(
"cpm_uart: the driver will guess configuration, but this mode is no longer supported.\n");
#ifndef CONFIG_SERIAL_CPM_CONSOLE
ret = cpm_uart_init_portdesc();
if (ret)
return ret;
#endif
cpm_reg.nr = cpm_uart_nr;
ret = uart_register_driver(&cpm_reg);
if (ret)
return ret;
for (i = 0; i < cpm_uart_nr; i++) {
int con = cpm_uart_port_map[i];
cpm_uart_ports[con].port.line = i;
cpm_uart_ports[con].port.flags = UPF_BOOT_AUTOCONF;
uart_add_one_port(&cpm_reg, &cpm_uart_ports[con].port);
}
}
return ret;
}
static void __exit cpm_uart_exit(void)
{
int i;
for (i = 0; i < cpm_uart_nr; i++) {
int con = cpm_uart_port_map[i];
uart_remove_one_port(&cpm_reg, &cpm_uart_ports[con].port);
}
driver_unregister(&cpm_scc_uart_driver);
driver_unregister(&cpm_smc_uart_driver);
uart_unregister_driver(&cpm_reg);
}

47
drivers/serial/cpm_uart/cpm_uart_cpm1.c
View File

@ -81,58 +81,11 @@ void cpm_line_cr_cmd(int line, int cmd)
void smc1_lineif(struct uart_cpm_port *pinfo)
{
volatile cpm8xx_t *cp = cpmp;
(void)cp; /* fix warning */
#if defined (CONFIG_MPC885ADS)
/* Enable SMC1 transceivers */
{
cp->cp_pepar |= 0x000000c0;
cp->cp_pedir &= ~0x000000c0;
cp->cp_peso &= ~0x00000040;
cp->cp_peso |= 0x00000080;
}
#elif defined (CONFIG_MPC86XADS)
unsigned int iobits = 0x000000c0;
if (!pinfo->is_portb) {
cp->cp_pbpar |= iobits;
cp->cp_pbdir &= ~iobits;
cp->cp_pbodr &= ~iobits;
} else {
((immap_t *)IMAP_ADDR)->im_ioport.iop_papar |= iobits;
((immap_t *)IMAP_ADDR)->im_ioport.iop_padir &= ~iobits;
((immap_t *)IMAP_ADDR)->im_ioport.iop_paodr &= ~iobits;
}
#endif
pinfo->brg = 1;
}
void smc2_lineif(struct uart_cpm_port *pinfo)
{
volatile cpm8xx_t *cp = cpmp;
(void)cp; /* fix warning */
#if defined (CONFIG_MPC885ADS)
cp->cp_pepar |= 0x00000c00;
cp->cp_pedir &= ~0x00000c00;
cp->cp_peso &= ~0x00000400;
cp->cp_peso |= 0x00000800;
#elif defined (CONFIG_MPC86XADS)
unsigned int iobits = 0x00000c00;
if (!pinfo->is_portb) {
cp->cp_pbpar |= iobits;
cp->cp_pbdir &= ~iobits;
cp->cp_pbodr &= ~iobits;
} else {
((immap_t *)IMAP_ADDR)->im_ioport.iop_papar |= iobits;
((immap_t *)IMAP_ADDR)->im_ioport.iop_padir &= ~iobits;
((immap_t *)IMAP_ADDR)->im_ioport.iop_paodr &= ~iobits;
}
#endif
pinfo->brg = 2;
}

9
drivers/serial/cpm_uart/cpm_uart_cpm2.c
View File

@ -142,21 +142,12 @@ void scc2_lineif(struct uart_cpm_port *pinfo)
* be supported in a sane fashion.
*/
#ifndef CONFIG_STX_GP3
#ifdef CONFIG_MPC8560_ADS
volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;
io->iop_ppard |= 0x00000018;
io->iop_psord &= ~0x00000008; /* Rx */
io->iop_psord &= ~0x00000010; /* Tx */
io->iop_pdird &= ~0x00000008; /* Rx */
io->iop_pdird |= 0x00000010; /* Tx */
#else
volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;
io->iop_pparb |= 0x008b0000;
io->iop_pdirb |= 0x00880000;
io->iop_psorb |= 0x00880000;
io->iop_pdirb &= ~0x00030000;
io->iop_psorb &= ~0x00030000;
#endif
#endif
cpm2_immr->im_cpmux.cmx_scr &= 0xff00ffff;
cpm2_immr->im_cpmux.cmx_scr |= 0x00090000;