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-rw-r--r--arch/mips/tx4938/toshiba_rbtx4938/Makefile2
-rw-r--r--arch/mips/tx4938/toshiba_rbtx4938/irq.c6
-rw-r--r--arch/mips/tx4938/toshiba_rbtx4938/setup.c171
-rw-r--r--arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c261
-rw-r--r--arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c164
5 files changed, 166 insertions, 438 deletions
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/Makefile b/arch/mips/tx4938/toshiba_rbtx4938/Makefile
index 226941279d7..10c94e62bf5 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/Makefile
+++ b/arch/mips/tx4938/toshiba_rbtx4938/Makefile
@@ -6,4 +6,4 @@
# unless it's something special (ie not a .c file).
#
-obj-y += prom.o setup.o irq.o spi_eeprom.o spi_txx9.o
+obj-y += prom.o setup.o irq.o spi_eeprom.o
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/irq.c b/arch/mips/tx4938/toshiba_rbtx4938/irq.c
index 2e96dbb248b..91aea7aff51 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/irq.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/irq.c
@@ -165,8 +165,6 @@ toshiba_rbtx4938_irq_ioc_disable(unsigned int irq)
TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
}
-extern void __init txx9_spi_irqinit(int irc_irq);
-
void __init arch_init_irq(void)
{
extern void tx4938_irq_init(void);
@@ -185,9 +183,5 @@ void __init arch_init_irq(void)
/* Onboard 10M Ether: High Active */
TX4938_WR(TX4938_MKA(TX4938_IRC_IRDM0), 0x00000040);
- if (tx4938_ccfgptr->pcfg & TX4938_PCFG_SPI_SEL) {
- txx9_spi_irqinit(RBTX4938_IRQ_IRC_SPI);
- }
-
wbflush();
}
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/setup.c b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
index 12b9f4f9c3a..361d89a8117 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/setup.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
@@ -14,13 +14,13 @@
#include <linux/init.h>
#include <linux/types.h>
#include <linux/ioport.h>
-#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/console.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
+#include <linux/clk.h>
#include <asm/wbflush.h>
#include <asm/reboot.h>
@@ -29,13 +29,15 @@
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/bootinfo.h>
-#include <asm/gpio.h>
#include <asm/tx4938/rbtx4938.h>
#ifdef CONFIG_SERIAL_TXX9
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#endif
+#include <linux/spi/spi.h>
+#include <asm/tx4938/spi.h>
+#include <asm/gpio.h>
extern void rbtx4938_time_init(void) __init;
extern char * __init prom_getcmdline(void);
@@ -575,44 +577,33 @@ arch_initcall(tx4938_pcibios_init);
#define SEEPROM3_CS 1 /* IOC */
#define SRTC_CS 2 /* IOC */
-static int rbtx4938_spi_cs_func(int chipid, int on)
+#ifdef CONFIG_PCI
+static unsigned char rbtx4938_ethaddr[17];
+static int __init rbtx4938_ethaddr_init(void)
{
- unsigned char bit;
- switch (chipid) {
- case RBTX4938_SEEPROM1_CHIPID:
- if (on)
- tx4938_pioptr->dout &= ~(1 << SEEPROM1_CS);
- else
- tx4938_pioptr->dout |= (1 << SEEPROM1_CS);
- return 0;
- break;
- case RBTX4938_SEEPROM2_CHIPID:
- bit = (1 << SEEPROM2_CS);
- break;
- case RBTX4938_SEEPROM3_CHIPID:
- bit = (1 << SEEPROM3_CS);
- break;
- case RBTX4938_SRTC_CHIPID:
- bit = (1 << SRTC_CS);
- break;
- default:
- return -ENODEV;
+ unsigned char sum;
+ int i;
+
+ /* 0-3: "MAC\0", 4-9:eth0, 10-15:eth1, 16:sum */
+ if (spi_eeprom_read(SEEPROM1_CS, 0,
+ rbtx4938_ethaddr, sizeof(rbtx4938_ethaddr)))
+ printk(KERN_ERR "seeprom: read error.\n");
+ else {
+ unsigned char *dat = rbtx4938_ethaddr;
+ if (strcmp(dat, "MAC") != 0)
+ printk(KERN_WARNING "seeprom: bad signature.\n");
+ for (i = 0, sum = 0; i < sizeof(dat); i++)
+ sum += dat[i];
+ if (sum)
+ printk(KERN_WARNING "seeprom: bad checksum.\n");
}
- /* bit1,2,4 are low active, bit3 is high active */
- *rbtx4938_spics_ptr =
- (*rbtx4938_spics_ptr & ~bit) |
- ((on ? (bit ^ 0x0b) : ~(bit ^ 0x0b)) & bit);
return 0;
}
-
-#ifdef CONFIG_PCI
-extern int spi_eeprom_read(int chipid, int address, unsigned char *buf, int len);
+device_initcall(rbtx4938_ethaddr_init);
int rbtx4938_get_tx4938_ethaddr(struct pci_dev *dev, unsigned char *addr)
{
struct pci_controller *channel = (struct pci_controller *)dev->bus->sysdata;
- static unsigned char dat[17];
- static int read_dat = 0;
int ch = 0;
if (channel != &tx4938_pci_controller[1])
@@ -628,29 +619,11 @@ int rbtx4938_get_tx4938_ethaddr(struct pci_dev *dev, unsigned char *addr)
default:
return -ENODEV;
}
- if (!read_dat) {
- unsigned char sum;
- int i;
- read_dat = 1;
- /* 0-3: "MAC\0", 4-9:eth0, 10-15:eth1, 16:sum */
- if (spi_eeprom_read(RBTX4938_SEEPROM1_CHIPID,
- 0, dat, sizeof(dat))) {
- printk(KERN_ERR "seeprom: read error.\n");
- } else {
- if (strcmp(dat, "MAC") != 0)
- printk(KERN_WARNING "seeprom: bad signature.\n");
- for (i = 0, sum = 0; i < sizeof(dat); i++)
- sum += dat[i];
- if (sum)
- printk(KERN_WARNING "seeprom: bad checksum.\n");
- }
- }
- memcpy(addr, &dat[4 + 6 * ch], 6);
+ memcpy(addr, &rbtx4938_ethaddr[4 + 6 * ch], 6);
return 0;
}
#endif /* CONFIG_PCI */
-extern void __init txx9_spi_init(unsigned long base, int (*cs_func)(int chipid, int on));
static void __init rbtx4938_spi_setup(void)
{
/* set SPI_SEL */
@@ -658,7 +631,6 @@ static void __init rbtx4938_spi_setup(void)
/* chip selects for SPI devices */
tx4938_pioptr->dout |= (1 << SEEPROM1_CS);
tx4938_pioptr->dir |= (1 << SEEPROM1_CS);
- txx9_spi_init(TX4938_SPI_REG, rbtx4938_spi_cs_func);
}
static struct resource rbtx4938_fpga_resource;
@@ -897,10 +869,8 @@ void tx4938_report_pcic_status(void)
/* We use onchip r4k counter or TMR timer as our system wide timer
* interrupt running at 100HZ. */
-extern void __init rtc_rx5c348_init(int chipid);
void __init rbtx4938_time_init(void)
{
- rtc_rx5c348_init(RBTX4938_SRTC_CHIPID);
mips_hpt_frequency = txx9_cpu_clock / 2;
}
@@ -1017,29 +987,6 @@ void __init toshiba_rbtx4938_setup(void)
*rbtx4938_dipsw_ptr, *rbtx4938_bdipsw_ptr);
}
-#ifdef CONFIG_PROC_FS
-extern void spi_eeprom_proc_create(struct proc_dir_entry *dir, int chipid);
-static int __init tx4938_spi_proc_setup(void)
-{
- struct proc_dir_entry *tx4938_spi_eeprom_dir;
-
- tx4938_spi_eeprom_dir = proc_mkdir("spi_eeprom", 0);
-
- if (!tx4938_spi_eeprom_dir)
- return -ENOMEM;
-
- /* don't allow user access to RBTX4938_SEEPROM1_CHIPID
- * as it contains eth0 and eth1 MAC addresses
- */
- spi_eeprom_proc_create(tx4938_spi_eeprom_dir, RBTX4938_SEEPROM2_CHIPID);
- spi_eeprom_proc_create(tx4938_spi_eeprom_dir, RBTX4938_SEEPROM3_CHIPID);
-
- return 0;
-}
-
-__initcall(tx4938_spi_proc_setup);
-#endif
-
static int __init rbtx4938_ne_init(void)
{
struct resource res[] = {
@@ -1161,3 +1108,73 @@ void gpio_set_value(unsigned gpio, int value)
else
rbtx4938_spi_gpio_set(gpio, value);
}
+
+/* SPI support */
+
+static void __init txx9_spi_init(unsigned long base, int irq)
+{
+ struct resource res[] = {
+ {
+ .start = base,
+ .end = base + 0x20 - 1,
+ .flags = IORESOURCE_MEM,
+ .parent = &tx4938_reg_resource,
+ }, {
+ .start = irq,
+ .flags = IORESOURCE_IRQ,
+ },
+ };
+ platform_device_register_simple("txx9spi", 0,
+ res, ARRAY_SIZE(res));
+}
+
+static int __init rbtx4938_spi_init(void)
+{
+ struct spi_board_info srtc_info = {
+ .modalias = "rs5c348",
+ .max_speed_hz = 1000000, /* 1.0Mbps @ Vdd 2.0V */
+ .bus_num = 0,
+ .chip_select = 16 + SRTC_CS,
+ /* Mode 1 (High-Active, Shift-Then-Sample), High Avtive CS */
+ .mode = SPI_MODE_1 | SPI_CS_HIGH,
+ };
+ spi_register_board_info(&srtc_info, 1);
+ spi_eeprom_register(SEEPROM1_CS);
+ spi_eeprom_register(16 + SEEPROM2_CS);
+ spi_eeprom_register(16 + SEEPROM3_CS);
+ txx9_spi_init(TX4938_SPI_REG & 0xfffffffffULL, RBTX4938_IRQ_IRC_SPI);
+ return 0;
+}
+arch_initcall(rbtx4938_spi_init);
+
+/* Minimum CLK support */
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+ if (!strcmp(id, "spi-baseclk"))
+ return (struct clk *)(txx9_gbus_clock / 2 / 4);
+ return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ return (unsigned long)clk;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c b/arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c
index 89596e62f90..4d6b4ade5e8 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c
@@ -10,209 +10,90 @@
* Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
*/
#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/proc_fs.h>
-#include <linux/spinlock.h>
+#include <linux/device.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/eeprom.h>
#include <asm/tx4938/spi.h>
-#include <asm/tx4938/tx4938.h>
-/* ATMEL 250x0 instructions */
-#define ATMEL_WREN 0x06
-#define ATMEL_WRDI 0x04
-#define ATMEL_RDSR 0x05
-#define ATMEL_WRSR 0x01
-#define ATMEL_READ 0x03
-#define ATMEL_WRITE 0x02
+#define AT250X0_PAGE_SIZE 8
-#define ATMEL_SR_BSY 0x01
-#define ATMEL_SR_WEN 0x02
-#define ATMEL_SR_BP0 0x04
-#define ATMEL_SR_BP1 0x08
-
-DEFINE_SPINLOCK(spi_eeprom_lock);
-
-static struct spi_dev_desc seeprom_dev_desc = {
- .baud = 1500000, /* 1.5Mbps */
- .tcss = 1,
- .tcsh = 1,
- .tcsr = 1,
- .byteorder = 1, /* MSB-First */
- .polarity = 0, /* High-Active */
- .phase = 0, /* Sample-Then-Shift */
-
-};
-static inline int
-spi_eeprom_io(int chipid,
- unsigned char **inbufs, unsigned int *incounts,
- unsigned char **outbufs, unsigned int *outcounts)
-{
- return txx9_spi_io(chipid, &seeprom_dev_desc,
- inbufs, incounts, outbufs, outcounts, 0);
-}
-
-int spi_eeprom_write_enable(int chipid, int enable)
+/* register board information for at25 driver */
+int __init spi_eeprom_register(int chipid)
{
- unsigned char inbuf[1];
- unsigned char *inbufs[1];
- unsigned int incounts[2];
- unsigned long flags;
- int stat;
- inbuf[0] = enable ? ATMEL_WREN : ATMEL_WRDI;
- inbufs[0] = inbuf;
- incounts[0] = sizeof(inbuf);
- incounts[1] = 0;
- spin_lock_irqsave(&spi_eeprom_lock, flags);
- stat = spi_eeprom_io(chipid, inbufs, incounts, NULL, NULL);
- spin_unlock_irqrestore(&spi_eeprom_lock, flags);
- return stat;
-}
-
-static int spi_eeprom_read_status_nolock(int chipid)
-{
- unsigned char inbuf[2], outbuf[2];
- unsigned char *inbufs[1], *outbufs[1];
- unsigned int incounts[2], outcounts[2];
- int stat;
- inbuf[0] = ATMEL_RDSR;
- inbuf[1] = 0;
- inbufs[0] = inbuf;
- incounts[0] = sizeof(inbuf);
- incounts[1] = 0;
- outbufs[0] = outbuf;
- outcounts[0] = sizeof(outbuf);
- outcounts[1] = 0;
- stat = spi_eeprom_io(chipid, inbufs, incounts, outbufs, outcounts);
- if (stat < 0)
- return stat;
- return outbuf[1];
+ static struct spi_eeprom eeprom = {
+ .name = "at250x0",
+ .byte_len = 128,
+ .page_size = AT250X0_PAGE_SIZE,
+ .flags = EE_ADDR1,
+ };
+ struct spi_board_info info = {
+ .modalias = "at25",
+ .max_speed_hz = 1500000, /* 1.5Mbps */
+ .bus_num = 0,
+ .chip_select = chipid,
+ .platform_data = &eeprom,
+ /* Mode 0: High-Active, Sample-Then-Shift */
+ };
+
+ return spi_register_board_info(&info, 1);
}
-int spi_eeprom_read_status(int chipid)
-{
- unsigned long flags;
- int stat;
- spin_lock_irqsave(&spi_eeprom_lock, flags);
- stat = spi_eeprom_read_status_nolock(chipid);
- spin_unlock_irqrestore(&spi_eeprom_lock, flags);
- return stat;
-}
+/* simple temporary spi driver to provide early access to seeprom. */
-int spi_eeprom_read(int chipid, int address, unsigned char *buf, int len)
-{
- unsigned char inbuf[2];
- unsigned char *inbufs[2], *outbufs[2];
- unsigned int incounts[2], outcounts[3];
- unsigned long flags;
- int stat;
- inbuf[0] = ATMEL_READ;
- inbuf[1] = address;
- inbufs[0] = inbuf;
- inbufs[1] = NULL;
- incounts[0] = sizeof(inbuf);
- incounts[1] = 0;
- outbufs[0] = NULL;
- outbufs[1] = buf;
- outcounts[0] = 2;
- outcounts[1] = len;
- outcounts[2] = 0;
- spin_lock_irqsave(&spi_eeprom_lock, flags);
- stat = spi_eeprom_io(chipid, inbufs, incounts, outbufs, outcounts);
- spin_unlock_irqrestore(&spi_eeprom_lock, flags);
- return stat;
-}
+static struct read_param {
+ int chipid;
+ int address;
+ unsigned char *buf;
+ int len;
+} *read_param;
-int spi_eeprom_write(int chipid, int address, unsigned char *buf, int len)
+static int __init early_seeprom_probe(struct spi_device *spi)
{
- unsigned char inbuf[2];
- unsigned char *inbufs[2];
- unsigned int incounts[3];
- unsigned long flags;
- int i, stat;
-
- if (address / 8 != (address + len - 1) / 8)
- return -EINVAL;
- stat = spi_eeprom_write_enable(chipid, 1);
- if (stat < 0)
- return stat;
- stat = spi_eeprom_read_status(chipid);
- if (stat < 0)
- return stat;
- if (!(stat & ATMEL_SR_WEN))
- return -EPERM;
-
- inbuf[0] = ATMEL_WRITE;
- inbuf[1] = address;
- inbufs[0] = inbuf;
- inbufs[1] = buf;
- incounts[0] = sizeof(inbuf);
- incounts[1] = len;
- incounts[2] = 0;
- spin_lock_irqsave(&spi_eeprom_lock, flags);
- stat = spi_eeprom_io(chipid, inbufs, incounts, NULL, NULL);
- if (stat < 0)
- goto unlock_return;
-
- /* write start. max 10ms */
- for (i = 10; i > 0; i--) {
- int stat = spi_eeprom_read_status_nolock(chipid);
- if (stat < 0)
- goto unlock_return;
- if (!(stat & ATMEL_SR_BSY))
- break;
- mdelay(1);
+ int stat = 0;
+ u8 cmd[2];
+ int len = read_param->len;
+ char *buf = read_param->buf;
+ int address = read_param->address;
+
+ dev_info(&spi->dev, "spiclk %u KHz.\n",
+ (spi->max_speed_hz + 500) / 1000);
+ if (read_param->chipid != spi->chip_select)
+ return -ENODEV;
+ while (len > 0) {
+ /* spi_write_then_read can only work with small chunk */
+ int c = len < AT250X0_PAGE_SIZE ? len : AT250X0_PAGE_SIZE;
+ cmd[0] = 0x03; /* AT25_READ */
+ cmd[1] = address;
+ stat = spi_write_then_read(spi, cmd, sizeof(cmd), buf, c);
+ buf += c;
+ len -= c;
+ address += c;
}
- spin_unlock_irqrestore(&spi_eeprom_lock, flags);
- if (i == 0)
- return -EIO;
- return len;
- unlock_return:
- spin_unlock_irqrestore(&spi_eeprom_lock, flags);
return stat;
}
-#ifdef CONFIG_PROC_FS
-#define MAX_SIZE 0x80 /* for ATMEL 25010 */
-static int spi_eeprom_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- unsigned int size = MAX_SIZE;
- if (spi_eeprom_read((int)data, 0, (unsigned char *)page, size) < 0)
- size = 0;
- return size;
-}
-
-static int spi_eeprom_write_proc(struct file *file, const char *buffer,
- unsigned long count, void *data)
-{
- unsigned int size = MAX_SIZE;
- int i;
- if (file->f_pos >= size)
- return -EIO;
- if (file->f_pos + count > size)
- count = size - file->f_pos;
- for (i = 0; i < count; i += 8) {
- int len = count - i < 8 ? count - i : 8;
- if (spi_eeprom_write((int)data, file->f_pos,
- (unsigned char *)buffer, len) < 0) {
- count = -EIO;
- break;
- }
- buffer += len;
- file->f_pos += len;
- }
- return count;
-}
+static struct spi_driver early_seeprom_driver __initdata = {
+ .driver = {
+ .name = "at25",
+ .owner = THIS_MODULE,
+ },
+ .probe = early_seeprom_probe,
+};
-__init void spi_eeprom_proc_create(struct proc_dir_entry *dir, int chipid)
+int __init spi_eeprom_read(int chipid, int address,
+ unsigned char *buf, int len)
{
- struct proc_dir_entry *entry;
- char name[128];
- sprintf(name, "seeprom-%d", chipid);
- entry = create_proc_entry(name, 0600, dir);
- if (entry) {
- entry->read_proc = spi_eeprom_read_proc;
- entry->write_proc = spi_eeprom_write_proc;
- entry->data = (void *)chipid;
- }
+ int ret;
+ struct read_param param = {
+ .chipid = chipid,
+ .address = address,
+ .buf = buf,
+ .len = len
+ };
+
+ read_param = &param;
+ ret = spi_register_driver(&early_seeprom_driver);
+ if (!ret)
+ spi_unregister_driver(&early_seeprom_driver);
+ return ret;
}
-#endif /* CONFIG_PROC_FS */
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c b/arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c
deleted file mode 100644
index 08b20cdfd7b..00000000000
--- a/arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * linux/arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c
- * Copyright (C) 2000-2001 Toshiba Corporation
- *
- * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
- * terms of the GNU General Public License version 2. This program is
- * licensed "as is" without any warranty of any kind, whether express
- * or implied.
- *
- * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
- */
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
-#include <asm/tx4938/spi.h>
-#include <asm/tx4938/tx4938.h>
-
-static int (*txx9_spi_cs_func)(int chipid, int on);
-static DEFINE_SPINLOCK(txx9_spi_lock);
-
-extern unsigned int txx9_gbus_clock;
-
-#define SPI_FIFO_SIZE 4
-
-void __init txx9_spi_init(unsigned long base, int (*cs_func)(int chipid, int on))
-{
- txx9_spi_cs_func = cs_func;
- /* enter config mode */
- tx4938_spiptr->mcr = TXx9_SPMCR_CONFIG | TXx9_SPMCR_BCLR;
-}
-
-static DECLARE_WAIT_QUEUE_HEAD(txx9_spi_wait);
-
-static irqreturn_t txx9_spi_interrupt(int irq, void *dev_id)
-{
- /* disable rx intr */
- tx4938_spiptr->cr0 &= ~TXx9_SPCR0_RBSIE;
- wake_up(&txx9_spi_wait);
-
- return IRQ_HANDLED;
-}
-
-static struct irqaction txx9_spi_action = {
- .handler = txx9_spi_interrupt,
- .name = "spi",
-};
-
-void __init txx9_spi_irqinit(int irc_irq)
-{
- setup_irq(irc_irq, &txx9_spi_action);
-}
-
-int txx9_spi_io(int chipid, struct spi_dev_desc *desc,
- unsigned char **inbufs, unsigned int *incounts,
- unsigned char **outbufs, unsigned int *outcounts,
- int cansleep)
-{
- unsigned int incount, outcount;
- unsigned char *inp, *outp;
- int ret;
- unsigned long flags;
-
- spin_lock_irqsave(&txx9_spi_lock, flags);
- if ((tx4938_spiptr->mcr & TXx9_SPMCR_OPMODE) == TXx9_SPMCR_ACTIVE) {
- spin_unlock_irqrestore(&txx9_spi_lock, flags);
- return -EBUSY;
- }
- /* enter config mode */
- tx4938_spiptr->mcr = TXx9_SPMCR_CONFIG | TXx9_SPMCR_BCLR;
- tx4938_spiptr->cr0 =
- (desc->byteorder ? TXx9_SPCR0_SBOS : 0) |
- (desc->polarity ? TXx9_SPCR0_SPOL : 0) |
- (desc->phase ? TXx9_SPCR0_SPHA : 0) |
- 0x08;
- tx4938_spiptr->cr1 =
- (((TXX9_IMCLK + desc->baud) / (2 * desc->baud) - 1) << 8) |
- 0x08 /* 8 bit only */;
- /* enter active mode */
- tx4938_spiptr->mcr = TXx9_SPMCR_ACTIVE;
- spin_unlock_irqrestore(&txx9_spi_lock, flags);
-
- /* CS ON */
- if ((ret = txx9_spi_cs_func(chipid, 1)) < 0) {
- spin_unlock_irqrestore(&txx9_spi_lock, flags);
- return ret;
- }
- udelay(desc->tcss);
-
- /* do scatter IO */
- inp = inbufs ? *inbufs : NULL;
- outp = outbufs ? *outbufs : NULL;
- incount = 0;
- outcount = 0;
- while (1) {
- unsigned char data;
- unsigned int count;
- int i;
- if (!incount) {
- incount = incounts ? *incounts++ : 0;
- inp = (incount && inbufs) ? *inbufs++ : NULL;
- }
- if (!outcount) {
- outcount = outcounts ? *outcounts++ : 0;
- outp = (outcount && outbufs) ? *outbufs++ : NULL;
- }
- if (!inp && !outp)
- break;
- count = SPI_FIFO_SIZE;
- if (incount)
- count = min(count, incount);
- if (outcount)
- count = min(count, outcount);
-
- /* now tx must be idle... */
- while (!(tx4938_spiptr->sr & TXx9_SPSR_SIDLE))
- ;
-
- tx4938_spiptr->cr0 =
- (tx4938_spiptr->cr0 & ~TXx9_SPCR0_RXIFL_MASK) |
- ((count - 1) << 12);
- if (cansleep) {
- /* enable rx intr */
- tx4938_spiptr->cr0 |= TXx9_SPCR0_RBSIE;
- }
- /* send */
- for (i = 0; i < count; i++)
- tx4938_spiptr->dr = inp ? *inp++ : 0;
- /* wait all rx data */
- if (cansleep) {
- wait_event(txx9_spi_wait,
- tx4938_spiptr->sr & TXx9_SPSR_SRRDY);
- } else {
- while (!(tx4938_spiptr->sr & TXx9_SPSR_RBSI))
- ;
- }
- /* receive */
- for (i = 0; i < count; i++) {
- data = tx4938_spiptr->dr;
- if (outp)
- *outp++ = data;
- }
- if (incount)
- incount -= count;
- if (outcount)
- outcount -= count;
- }
-
- /* CS OFF */
- udelay(desc->tcsh);
- txx9_spi_cs_func(chipid, 0);
- udelay(desc->tcsr);
-
- spin_lock_irqsave(&txx9_spi_lock, flags);
- /* enter config mode */
- tx4938_spiptr->mcr = TXx9_SPMCR_CONFIG | TXx9_SPMCR_BCLR;
- spin_unlock_irqrestore(&txx9_spi_lock, flags);
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 13:13:21 +0000