diff options
Diffstat (limited to 'arch/mips/tx4938')
| -rw-r--r-- | arch/mips/tx4938/common/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/tx4938/common/rtc_rx5c348.c | 192 | ||||
| -rw-r--r-- | arch/mips/tx4938/toshiba_rbtx4938/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/tx4938/toshiba_rbtx4938/irq.c | 6 | ||||
| -rw-r--r-- | arch/mips/tx4938/toshiba_rbtx4938/setup.c | 171 | ||||
| -rw-r--r-- | arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c | 261 | ||||
| -rw-r--r-- | arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c | 164 |
7 files changed, 167 insertions, 631 deletions
diff --git a/arch/mips/tx4938/common/Makefile b/arch/mips/tx4938/common/Makefile index 2033ae77f632..83cda518f204 100644 --- a/arch/mips/tx4938/common/Makefile +++ b/arch/mips/tx4938/common/Makefile @@ -6,6 +6,6 @@ # unless it's something special (ie not a .c file). # -obj-y += prom.o setup.o irq.o rtc_rx5c348.o +obj-y += prom.o setup.o irq.o obj-$(CONFIG_KGDB) += dbgio.o diff --git a/arch/mips/tx4938/common/rtc_rx5c348.c b/arch/mips/tx4938/common/rtc_rx5c348.c deleted file mode 100644 index 07f782fc0725..000000000000 --- a/arch/mips/tx4938/common/rtc_rx5c348.c +++ /dev/null @@ -1,192 +0,0 @@ -/* - * RTC routines for RICOH Rx5C348 SPI chip. - * 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/kernel.h> -#include <linux/string.h> -#include <linux/rtc.h> -#include <linux/time.h> -#include <linux/bcd.h> -#include <asm/time.h> -#include <asm/tx4938/spi.h> - -#define EPOCH 2000 - -/* registers */ -#define Rx5C348_REG_SECOND 0 -#define Rx5C348_REG_MINUTE 1 -#define Rx5C348_REG_HOUR 2 -#define Rx5C348_REG_WEEK 3 -#define Rx5C348_REG_DAY 4 -#define Rx5C348_REG_MONTH 5 -#define Rx5C348_REG_YEAR 6 -#define Rx5C348_REG_ADJUST 7 -#define Rx5C348_REG_ALARM_W_MIN 8 -#define Rx5C348_REG_ALARM_W_HOUR 9 -#define Rx5C348_REG_ALARM_W_WEEK 10 -#define Rx5C348_REG_ALARM_D_MIN 11 -#define Rx5C348_REG_ALARM_D_HOUR 12 -#define Rx5C348_REG_CTL1 14 -#define Rx5C348_REG_CTL2 15 - -/* register bits */ -#define Rx5C348_BIT_PM 0x20 /* REG_HOUR */ -#define Rx5C348_BIT_Y2K 0x80 /* REG_MONTH */ -#define Rx5C348_BIT_24H 0x20 /* REG_CTL1 */ -#define Rx5C348_BIT_XSTP 0x10 /* REG_CTL2 */ - -/* commands */ -#define Rx5C348_CMD_W(addr) (((addr) << 4) | 0x08) /* single write */ -#define Rx5C348_CMD_R(addr) (((addr) << 4) | 0x0c) /* single read */ -#define Rx5C348_CMD_MW(addr) (((addr) << 4) | 0x00) /* burst write */ -#define Rx5C348_CMD_MR(addr) (((addr) << 4) | 0x04) /* burst read */ - -static struct spi_dev_desc srtc_dev_desc = { - .baud = 1000000, /* 1.0Mbps @ Vdd 2.0V */ - .tcss = 31, - .tcsh = 1, - .tcsr = 62, - /* 31us for Tcss (62us for Tcsr) is required for carry operation) */ - .byteorder = 1, /* MSB-First */ - .polarity = 0, /* High-Active */ - .phase = 1, /* Shift-Then-Sample */ - -}; -static int srtc_chipid; -static int srtc_24h; - -static inline int -spi_rtc_io(unsigned char *inbuf, unsigned char *outbuf, unsigned int count) -{ - unsigned char *inbufs[1], *outbufs[1]; - unsigned int incounts[2], outcounts[2]; - inbufs[0] = inbuf; - incounts[0] = count; - incounts[1] = 0; - outbufs[0] = outbuf; - outcounts[0] = count; - outcounts[1] = 0; - return txx9_spi_io(srtc_chipid, &srtc_dev_desc, - inbufs, incounts, outbufs, outcounts, 0); -} - -/* RTC-dependent code for time.c */ - -static int -rtc_rx5c348_set_time(unsigned long t) -{ - unsigned char inbuf[8]; - struct rtc_time tm; - u8 year, month, day, hour, minute, second, century; - - /* convert */ - to_tm(t, &tm); - - year = tm.tm_year % 100; - month = tm.tm_mon+1; /* tm_mon starts from 0 to 11 */ - day = tm.tm_mday; - hour = tm.tm_hour; - minute = tm.tm_min; - second = tm.tm_sec; - century = tm.tm_year / 100; - - inbuf[0] = Rx5C348_CMD_MW(Rx5C348_REG_SECOND); - BIN_TO_BCD(second); - inbuf[1] = second; - BIN_TO_BCD(minute); - inbuf[2] = minute; - - if (srtc_24h) { - BIN_TO_BCD(hour); - inbuf[3] = hour; - } else { - /* hour 0 is AM12, noon is PM12 */ - inbuf[3] = 0; - if (hour >= 12) - inbuf[3] = Rx5C348_BIT_PM; - hour = (hour + 11) % 12 + 1; - BIN_TO_BCD(hour); - inbuf[3] |= hour; - } - inbuf[4] = 0; /* ignore week */ - BIN_TO_BCD(day); - inbuf[5] = day; - BIN_TO_BCD(month); - inbuf[6] = month; - if (century >= 20) - inbuf[6] |= Rx5C348_BIT_Y2K; - BIN_TO_BCD(year); - inbuf[7] = year; - /* write in one transfer to avoid data inconsistency */ - return spi_rtc_io(inbuf, NULL, 8); -} - -static unsigned long -rtc_rx5c348_get_time(void) -{ - unsigned char inbuf[8], outbuf[8]; - unsigned int year, month, day, hour, minute, second; - - inbuf[0] = Rx5C348_CMD_MR(Rx5C348_REG_SECOND); - memset(inbuf + 1, 0, 7); - /* read in one transfer to avoid data inconsistency */ - if (spi_rtc_io(inbuf, outbuf, 8)) - return 0; - second = outbuf[1]; - BCD_TO_BIN(second); - minute = outbuf[2]; - BCD_TO_BIN(minute); - if (srtc_24h) { - hour = outbuf[3]; - BCD_TO_BIN(hour); - } else { - hour = outbuf[3] & ~Rx5C348_BIT_PM; - BCD_TO_BIN(hour); - hour %= 12; - if (outbuf[3] & Rx5C348_BIT_PM) - hour += 12; - } - day = outbuf[5]; - BCD_TO_BIN(day); - month = outbuf[6] & ~Rx5C348_BIT_Y2K; - BCD_TO_BIN(month); - year = outbuf[7]; - BCD_TO_BIN(year); - year += EPOCH; - - return mktime(year, month, day, hour, minute, second); -} - -void __init -rtc_rx5c348_init(int chipid) -{ - unsigned char inbuf[2], outbuf[2]; - srtc_chipid = chipid; - /* turn on RTC if it is not on */ - inbuf[0] = Rx5C348_CMD_R(Rx5C348_REG_CTL2); - inbuf[1] = 0; - spi_rtc_io(inbuf, outbuf, 2); - if (outbuf[1] & Rx5C348_BIT_XSTP) { - inbuf[0] = Rx5C348_CMD_W(Rx5C348_REG_CTL2); - inbuf[1] = 0; - spi_rtc_io(inbuf, NULL, 2); - } - - inbuf[0] = Rx5C348_CMD_R(Rx5C348_REG_CTL1); - inbuf[1] = 0; - spi_rtc_io(inbuf, outbuf, 2); - if (outbuf[1] & Rx5C348_BIT_24H) - srtc_24h = 1; - - /* set the function pointers */ - rtc_mips_get_time = rtc_rx5c348_get_time; - rtc_mips_set_time = rtc_rx5c348_set_time; -} diff --git a/arch/mips/tx4938/toshiba_rbtx4938/Makefile b/arch/mips/tx4938/toshiba_rbtx4938/Makefile index 226941279d75..10c94e62bf5b 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 2e96dbb248b1..91aea7aff515 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 12b9f4f9c3a2..361d89a81175 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 89596e62f909..4d6b4ade5e8c 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 = ¶m; + 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 08b20cdfd7b3..000000000000 --- 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; -} |