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[POWERPC] cpm_uart: Be an of_platform device when CONFIG_PPC_CPM_NEW_BINDING is set.

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The existing OF glue code was crufty and broken.  Rather than fix it,
it has been removed, and the serial driver now talks to the device tree
directly.

The non-CONFIG_PPC_CPM_NEW_BINDING code can go away once CPM platforms
are dropped from arch/ppc (which will hopefully be soon), and existing
arch/powerpc boards that I wasn't able to test on for this patchset get
converted (which should be even sooner).

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Scott Wood 2007-07-17 17:59:06 -05:00 committed by Kumar Gala
parent a94b89a481
commit 7ae870368d
6 changed files with 260 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/serial/cpm_uart/cpm_uart.h
View File

@ -80,14 +80,18 @@ struct uart_cpm_port {
int is_portb;
/* wait on close if needed */
int wait_closing;
/* value to combine with opcode to form cpm command */
u32 command;
};
#ifndef CONFIG_PPC_CPM_NEW_BINDING
extern int cpm_uart_port_map[UART_NR];
#endif
extern int cpm_uart_nr;
extern struct uart_cpm_port cpm_uart_ports[UART_NR];
/* these are located in their respective files */
void cpm_line_cr_cmd(int line, int cmd);
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd);
int cpm_uart_init_portdesc(void);
int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con);
void cpm_uart_freebuf(struct uart_cpm_port *pinfo);

241
drivers/serial/cpm_uart/cpm_uart_core.c
View File

@ -10,7 +10,7 @@
* Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2)
* Pantelis Antoniou (panto@intracom.gr) (CPM1)
*
* Copyright (C) 2004 Freescale Semiconductor, Inc.
* Copyright (C) 2004, 2007 Freescale Semiconductor, Inc.
* (C) 2004 Intracom, S.A.
* (C) 2005-2006 MontaVista Software, Inc.
* Vitaly Bordug <vbordug@ru.mvista.com>
@ -47,6 +47,11 @@
#include <asm/irq.h>
#include <asm/delay.h>
#include <asm/fs_pd.h>
#include <asm/udbg.h>
#ifdef CONFIG_PPC_CPM_NEW_BINDING
#include <linux/of_platform.h>
#endif
#if defined(CONFIG_SERIAL_CPM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
@ -57,12 +62,6 @@
#include "cpm_uart.h"
/***********************************************************************/
/* 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 = 0;
/**************************************************************/
@ -73,6 +72,11 @@ static void cpm_uart_initbd(struct uart_cpm_port *pinfo);
/**************************************************************/
#ifndef CONFIG_PPC_CPM_NEW_BINDING
/* 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;
/* Place-holder for board-specific stuff */
struct platform_device* __attribute__ ((weak)) __init
@ -119,6 +123,7 @@ static int cpm_uart_id2nr(int id)
/* not found or invalid argument */
return -1;
}
#endif
/*
* Check, if transmit buffers are processed
@ -232,15 +237,14 @@ static void cpm_uart_enable_ms(struct uart_port *port)
static void cpm_uart_break_ctl(struct uart_port *port, int break_state)
{
struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
int line = pinfo - cpm_uart_ports;
pr_debug("CPM uart[%d]:break ctrl, break_state: %d\n", port->line,
break_state);
if (break_state)
cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX);
else
cpm_line_cr_cmd(line, CPM_CR_RESTART_TX);
cpm_line_cr_cmd(pinfo, CPM_CR_RESTART_TX);
}
/*
@ -407,7 +411,6 @@ static int cpm_uart_startup(struct uart_port *port)
{
int retval;
struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
int line = pinfo - cpm_uart_ports;
pr_debug("CPM uart[%d]:startup\n", port->line);
@ -426,7 +429,7 @@ static int cpm_uart_startup(struct uart_port *port)
}
if (!(pinfo->flags & FLAG_CONSOLE))
cpm_line_cr_cmd(line,CPM_CR_INIT_TRX);
cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
return 0;
}
@ -442,7 +445,6 @@ inline void cpm_uart_wait_until_send(struct uart_cpm_port *pinfo)
static void cpm_uart_shutdown(struct uart_port *port)
{
struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
int line = pinfo - cpm_uart_ports;
pr_debug("CPM uart[%d]:shutdown\n", port->line);
@ -473,9 +475,9 @@ static void cpm_uart_shutdown(struct uart_port *port)
/* Shut them really down and reinit buffer descriptors */
if (IS_SMC(pinfo))
cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX);
else
cpm_line_cr_cmd(line, CPM_CR_GRA_STOP_TX);
cpm_line_cr_cmd(pinfo, CPM_CR_GRA_STOP_TX);
cpm_uart_initbd(pinfo);
}
@ -595,7 +597,6 @@ static void cpm_uart_set_termios(struct uart_port *port,
cpm_set_brg(pinfo->brg - 1, baud);
spin_unlock_irqrestore(&port->lock, flags);
}
static const char *cpm_uart_type(struct uart_port *port)
@ -742,7 +743,6 @@ static void cpm_uart_initbd(struct uart_cpm_port *pinfo)
static void cpm_uart_init_scc(struct uart_cpm_port *pinfo)
{
int line = pinfo - cpm_uart_ports;
volatile scc_t *scp;
volatile scc_uart_t *sup;
@ -783,7 +783,7 @@ static void cpm_uart_init_scc(struct uart_cpm_port *pinfo)
/* Send the CPM an initialize command.
*/
cpm_line_cr_cmd(line, CPM_CR_INIT_TRX);
cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
/* Set UART mode, 8 bit, no parity, one stop.
* Enable receive and transmit.
@ -803,7 +803,6 @@ static void cpm_uart_init_scc(struct uart_cpm_port *pinfo)
static void cpm_uart_init_smc(struct uart_cpm_port *pinfo)
{
int line = pinfo - cpm_uart_ports;
volatile smc_t *sp;
volatile smc_uart_t *up;
@ -840,7 +839,7 @@ static void cpm_uart_init_smc(struct uart_cpm_port *pinfo)
up->smc_brkec = 0;
up->smc_brkcr = 1;
cpm_line_cr_cmd(line, CPM_CR_INIT_TRX);
cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
/* Set UART mode, 8 bit, no parity, one stop.
* Enable receive and transmit.
@ -929,6 +928,85 @@ static struct uart_ops cpm_uart_pops = {
.verify_port = cpm_uart_verify_port,
};
#ifdef CONFIG_PPC_CPM_NEW_BINDING
struct uart_cpm_port cpm_uart_ports[UART_NR];
int cpm_uart_init_port(struct device_node *np, struct uart_cpm_port *pinfo)
{
const u32 *data;
void __iomem *mem, __iomem *pram;
int len;
int ret;
data = of_get_property(np, "fsl,cpm-brg", &len);
if (!data || len != 4) {
printk(KERN_ERR "CPM UART %s has no/invalid "
"fsl,cpm-brg property.\n", np->name);
return -EINVAL;
}
pinfo->brg = *data;
data = of_get_property(np, "fsl,cpm-command", &len);
if (!data || len != 4) {
printk(KERN_ERR "CPM UART %s has no/invalid "
"fsl,cpm-command property.\n", np->name);
return -EINVAL;
}
pinfo->command = *data;
mem = of_iomap(np, 0);
if (!mem)
return -ENOMEM;
pram = of_iomap(np, 1);
if (!pram) {
ret = -ENOMEM;
goto out_mem;
}
if (of_device_is_compatible(np, "fsl,cpm1-scc-uart") ||
of_device_is_compatible(np, "fsl,cpm2-scc-uart")) {
pinfo->sccp = mem;
pinfo->sccup = pram;
} else if (of_device_is_compatible(np, "fsl,cpm1-smc-uart") ||
of_device_is_compatible(np, "fsl,cpm2-smc-uart")) {
pinfo->flags |= FLAG_SMC;
pinfo->smcp = mem;
pinfo->smcup = pram;
} else {
ret = -ENODEV;
goto out_pram;
}
pinfo->tx_nrfifos = TX_NUM_FIFO;
pinfo->tx_fifosize = TX_BUF_SIZE;
pinfo->rx_nrfifos = RX_NUM_FIFO;
pinfo->rx_fifosize = RX_BUF_SIZE;
pinfo->port.uartclk = ppc_proc_freq;
pinfo->port.mapbase = (unsigned long)mem;
pinfo->port.type = PORT_CPM;
pinfo->port.ops = &cpm_uart_pops,
pinfo->port.iotype = UPIO_MEM;
spin_lock_init(&pinfo->port.lock);
pinfo->port.irq = of_irq_to_resource(np, 0, NULL);
if (pinfo->port.irq == NO_IRQ) {
ret = -EINVAL;
goto out_pram;
}
return cpm_uart_request_port(&pinfo->port);
out_pram:
iounmap(pram);
out_mem:
iounmap(mem);
return ret;
}
#else
struct uart_cpm_port cpm_uart_ports[UART_NR] = {
[UART_SMC1] = {
.port = {
@ -1072,6 +1150,7 @@ int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con)
return 0;
}
#endif
#ifdef CONFIG_SERIAL_CPM_CONSOLE
/*
@ -1083,8 +1162,12 @@ int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con)
static void cpm_uart_console_write(struct console *co, const char *s,
u_int count)
{
#ifdef CONFIG_PPC_CPM_NEW_BINDING
struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index];
#else
struct uart_cpm_port *pinfo =
&cpm_uart_ports[cpm_uart_port_map[co->index]];
#endif
unsigned int i;
volatile cbd_t *bdp, *bdbase;
volatile unsigned char *cp;
@ -1155,13 +1238,47 @@ static void cpm_uart_console_write(struct console *co, const char *s,
static int __init cpm_uart_console_setup(struct console *co, char *options)
{
struct uart_port *port;
struct uart_cpm_port *pinfo;
int baud = 38400;
int bits = 8;
int parity = 'n';
int flow = 'n';
int ret;
struct uart_cpm_port *pinfo;
struct uart_port *port;
#ifdef CONFIG_PPC_CPM_NEW_BINDING
struct device_node *np = NULL;
int i = 0;
if (co->index >= UART_NR) {
printk(KERN_ERR "cpm_uart: console index %d too high\n",
co->index);
return -ENODEV;
}
do {
np = of_find_node_by_type(np, "serial");
if (!np)
return -ENODEV;
if (!of_device_is_compatible(np, "fsl,cpm1-smc-uart") &&
!of_device_is_compatible(np, "fsl,cpm1-scc-uart") &&
!of_device_is_compatible(np, "fsl,cpm2-smc-uart") &&
!of_device_is_compatible(np, "fsl,cpm2-scc-uart"))
i--;
} while (i++ != co->index);
pinfo = &cpm_uart_ports[co->index];
pinfo->flags |= FLAG_CONSOLE;
port = &pinfo->port;
ret = cpm_uart_init_port(np, pinfo);
of_node_put(np);
if (ret)
return ret;
#else
struct fs_uart_platform_info *pdata;
struct platform_device* pdev = early_uart_get_pdev(co->index);
@ -1188,6 +1305,7 @@ static int __init cpm_uart_console_setup(struct console *co, char *options)
}
pinfo->flags |= FLAG_CONSOLE;
#endif
if (options) {
uart_parse_options(options, &baud, &parity, &bits, &flow);
@ -1196,6 +1314,10 @@ static int __init cpm_uart_console_setup(struct console *co, char *options)
baud = 9600;
}
#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
udbg_putc = NULL;
#endif
if (IS_SMC(pinfo)) {
pinfo->smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
pinfo->smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
@ -1252,7 +1374,81 @@ static struct uart_driver cpm_reg = {
.major = SERIAL_CPM_MAJOR,
.minor = SERIAL_CPM_MINOR,
.cons = CPM_UART_CONSOLE,
.nr = UART_NR,
};
#ifdef CONFIG_PPC_CPM_NEW_BINDING
static int probe_index;
static int __devinit cpm_uart_probe(struct of_device *ofdev,
const struct of_device_id *match)
{
int index = probe_index++;
struct uart_cpm_port *pinfo = &cpm_uart_ports[index];
int ret;
pinfo->port.line = index;
if (index >= UART_NR)
return -ENODEV;
dev_set_drvdata(&ofdev->dev, pinfo);
ret = cpm_uart_init_port(ofdev->node, pinfo);
if (ret)
return ret;
return uart_add_one_port(&cpm_reg, &pinfo->port);
}
static int __devexit cpm_uart_remove(struct of_device *ofdev)
{
struct uart_cpm_port *pinfo = dev_get_drvdata(&ofdev->dev);
return uart_remove_one_port(&cpm_reg, &pinfo->port);
}
static struct of_device_id cpm_uart_match[] = {
{
.compatible = "fsl,cpm1-smc-uart",
},
{
.compatible = "fsl,cpm1-scc-uart",
},
{
.compatible = "fsl,cpm2-smc-uart",
},
{
.compatible = "fsl,cpm2-scc-uart",
},
{}
};
static struct of_platform_driver cpm_uart_driver = {
.name = "cpm_uart",
.match_table = cpm_uart_match,
.probe = cpm_uart_probe,
.remove = cpm_uart_remove,
};
static int __init cpm_uart_init(void)
{
int ret = uart_register_driver(&cpm_reg);
if (ret)
return ret;
ret = of_register_platform_driver(&cpm_uart_driver);
if (ret)
uart_unregister_driver(&cpm_reg);
return ret;
}
static void __exit cpm_uart_exit(void)
{
of_unregister_platform_driver(&cpm_uart_driver);
uart_unregister_driver(&cpm_reg);
}
#else
static int cpm_uart_drv_probe(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
@ -1380,6 +1576,7 @@ static void __exit cpm_uart_exit(void)
driver_unregister(&cpm_smc_uart_driver);
uart_unregister_driver(&cpm_reg);
}
#endif
module_init(cpm_uart_init);
module_exit(cpm_uart_exit);

16
drivers/serial/cpm_uart/cpm_uart_cpm1.c
View File

@ -49,9 +49,20 @@
/**************************************************************/
void cpm_line_cr_cmd(int line, int cmd)
#ifdef CONFIG_PPC_CPM_NEW_BINDING
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
{
u16 __iomem *cpcr = &cpmp->cp_cpcr;
out_be16(cpcr, port->command | (cmd << 8) | CPM_CR_FLG);
while (in_be16(cpcr) & CPM_CR_FLG)
;
}
#else
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
{
ushort val;
int line = port - cpm_uart_ports;
volatile cpm8xx_t *cp = cpmp;
switch (line) {
@ -114,6 +125,7 @@ void scc4_lineif(struct uart_cpm_port *pinfo)
/* XXX SCC4: insert port configuration here */
pinfo->brg = 4;
}
#endif
/*
* Allocate DP-Ram and memory buffers. We need to allocate a transmit and
@ -184,6 +196,7 @@ void cpm_uart_freebuf(struct uart_cpm_port *pinfo)
cpm_dpfree(pinfo->dp_addr);
}
#ifndef CONFIG_PPC_CPM_NEW_BINDING
/* Setup any dynamic params in the uart desc */
int cpm_uart_init_portdesc(void)
{
@ -279,3 +292,4 @@ int cpm_uart_init_portdesc(void)
#endif
return 0;
}
#endif

2
drivers/serial/cpm_uart/cpm_uart_cpm1.h
View File

@ -13,12 +13,14 @@
#include <asm/commproc.h>
/* defines for IRQs */
#ifndef CONFIG_PPC_CPM_NEW_BINDING
#define SMC1_IRQ (CPM_IRQ_OFFSET + CPMVEC_SMC1)
#define SMC2_IRQ (CPM_IRQ_OFFSET + CPMVEC_SMC2)
#define SCC1_IRQ (CPM_IRQ_OFFSET + CPMVEC_SCC1)
#define SCC2_IRQ (CPM_IRQ_OFFSET + CPMVEC_SCC2)
#define SCC3_IRQ (CPM_IRQ_OFFSET + CPMVEC_SCC3)
#define SCC4_IRQ (CPM_IRQ_OFFSET + CPMVEC_SCC4)
#endif
static inline void cpm_set_brg(int brg, int baud)
{

18
drivers/serial/cpm_uart/cpm_uart_cpm2.c
View File

@ -49,9 +49,22 @@
/**************************************************************/
void cpm_line_cr_cmd(int line, int cmd)
#ifdef CONFIG_PPC_CPM_NEW_BINDING
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
{
cpm_cpm2_t __iomem *cp = cpm2_map(im_cpm);
out_be32(&cp->cp_cpcr, port->command | cmd | CPM_CR_FLG);
while (in_be32(&cp->cp_cpcr) & CPM_CR_FLG)
;
cpm2_unmap(cp);
}
#else
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd)
{
ulong val;
int line = port - cpm_uart_ports;
volatile cpm_cpm2_t *cp = cpm2_map(im_cpm);
@ -211,6 +224,7 @@ void scc4_lineif(struct uart_cpm_port *pinfo)
cpm2_unmap(cpmux);
cpm2_unmap(io);
}
#endif
/*
* Allocate DP-Ram and memory buffers. We need to allocate a transmit and
@ -281,6 +295,7 @@ void cpm_uart_freebuf(struct uart_cpm_port *pinfo)
cpm_dpfree(pinfo->dp_addr);
}
#ifndef CONFIG_PPC_CPM_NEW_BINDING
/* Setup any dynamic params in the uart desc */
int cpm_uart_init_portdesc(void)
{
@ -386,3 +401,4 @@ int cpm_uart_init_portdesc(void)
return 0;
}
#endif

2
drivers/serial/cpm_uart/cpm_uart_cpm2.h
View File

@ -13,12 +13,14 @@
#include <asm/cpm2.h>
/* defines for IRQs */
#ifndef CONFIG_PPC_CPM_NEW_BINDING
#define SMC1_IRQ SIU_INT_SMC1
#define SMC2_IRQ SIU_INT_SMC2
#define SCC1_IRQ SIU_INT_SCC1
#define SCC2_IRQ SIU_INT_SCC2
#define SCC3_IRQ SIU_INT_SCC3
#define SCC4_IRQ SIU_INT_SCC4
#endif
static inline void cpm_set_brg(int brg, int baud)
{