+++ /dev/null
-/* CF-mips driver
- This is a block driver for the direct (mmaped) interface to the CF-slot,
- found in Routerboard.com's RB532 board
- See SDK provided from routerboard.com.
-
- Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
- Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
-
- This work is redistributed under the terms of the GNU General Public License.
-*/
-
-#include <linux/kernel.h> /* printk() */
-#include <linux/module.h> /* module to be loadable */
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/pci.h>
-#include <linux/ioport.h> /* request_mem_region() */
-
-#include <asm/unaligned.h>
-#include <asm/io.h>
-#include <asm/gpio.h>
-
-#include <gpio.h>
-#include <adm5120_defs.h>
-#include <adm5120_irq.h>
-#include <adm5120_switch.h>
-#include <adm5120_intc.h>
-#include <adm5120_mpmc.h>
-#include <adm5120_cf.h>
-
-#include "ata.h"
-
-#define REQUEST_MEM_REGION 0
-#define DEBUG 1
-
-#if DEBUG
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
-
-#define SECS 1000000 /* unit for wait_not_busy() is 1us */
-
-unsigned cf_head = 0;
-unsigned cf_cyl = 0;
-unsigned cf_spt = 0;
-unsigned cf_sectors = 0;
-static unsigned cf_block_size = 1;
-
-#define DBUF32 ((volatile u32 *)((unsigned long)dev->baddr | ATA_DBUF_OFFSET))
-
-#define INTC_WRITE(reg, val) __raw_writel((val), \
- (void __iomem *)(KSEG1ADDR(ADM5120_INTC_BASE) + reg))
-
-#define INTC_READ(reg) __raw_readl(\
- (void __iomem *)(KSEG1ADDR(ADM5120_INTC_BASE) + reg))
-
-static void cf_do_tasklet(unsigned long dev_l);
-
-
-static inline void wareg(u8 val, unsigned reg, struct cf_mips_dev* dev)
-{
- writeb(val, dev->baddr + ATA_REG_OFFSET + reg);
-}
-
-static inline u8 rareg(unsigned reg, struct cf_mips_dev* dev)
-{
- return readb(dev->baddr + ATA_REG_OFFSET + reg);
-}
-
-static inline int cfrdy(struct cf_mips_dev *dev)
-{
- return gpio_get_value(12);
-}
-
-static inline void prepare_cf_irq(struct cf_mips_dev *dev)
-{
- /* interrupt on cf ready (not busy) */
- INTC_WRITE(INTC_REG_INT_LEVEL, INTC_READ(INTC_REG_INT_LEVEL) | ADM5120_CF_IRQ_LEVEL_BIT);
-
- /* FIXME: how to clear interrupt status? */
-}
-
-static inline int cf_present(struct cf_mips_dev* dev)
-{
- /* TODO: read and configure CIS into memory mapped mode
- * TODO: parse CISTPL_CONFIG on CF+ cards to get base address (0x200)
- * TODO: maybe adjust power saving setting for Hitachi Microdrive
- */
-
- /* FIXME: enabling of EXTIO will be done by BIOS in future */
- unsigned cmd = EXTIO_CS0_INT0_EN;
- int i;
-
- /* on RB100 WAIT is LOW all the time => read will hang */
- if (gpio_get_value(8))
- cmd |= EXTIO_WAIT_EN;
-
- SW_WRITE_REG(GPIO_CONF2, cmd);
- SW_WRITE_REG(GPIO_CONF0, (SW_READ_REG(GPIO_CONF0) & ~(1 << (16 + ADM5120_CF_GPIO_NUM))));
-
- /* FIXME: timings will be set by BIOS in future - remove this */
- MPMC_WRITE_REG(SC2, 0x88);
- MPMC_WRITE_REG(WEN2, 0x02);
- MPMC_WRITE_REG(OEN2, 0x03);
- MPMC_WRITE_REG(RD2, 0x1a);
- MPMC_WRITE_REG(PG2, 0x1d);
- MPMC_WRITE_REG(WR2, 0x14);
- MPMC_WRITE_REG(TN2, 0x09);
-
- for (i = 0; i < 0x10; ++i) {
- if (rareg(i,dev) != 0xff)
- return 1;
- }
- return 0;
-}
-
-static inline int is_busy(struct cf_mips_dev *dev)
-{
- return !cfrdy(dev);
-}
-
-static int wait_not_busy(int to_us, int wait_for_busy,struct cf_mips_dev *dev)
-{
- int us_passed = 0;
- if (wait_for_busy && !is_busy(dev)) {
- /* busy must appear within 400ns,
- * but it may dissapear before we see it
- * => must not wait for busy in a loop
- */
- ndelay(400);
- }
-
- do {
- if (us_passed)
- udelay(1); /* never reached in async mode */
- if (!is_busy(dev)) {
- if (us_passed > 1 * SECS) {
- printk(KERN_WARNING "cf-mips: not busy ok (after %dus)"
- ", status 0x%02x\n", us_passed, (unsigned) rareg(ATA_REG_ST,dev));
- }
- return CF_TRANS_OK;
- }
- if (us_passed == 1 * SECS) {
- printk(KERN_WARNING "cf-mips: wait not busy %dus..\n", to_us);
- }
- if (dev->async_mode) {
- dev->to_timer.expires = jiffies + (to_us * HZ / SECS);
- dev->irq_enable_time = jiffies;
- prepare_cf_irq(dev);
- if (is_busy(dev)) {
- add_timer(&dev->to_timer);
- enable_irq(dev->irq);
- return CF_TRANS_IN_PROGRESS;
- }
- continue;
- }
- ++us_passed;
- } while (us_passed < to_us);
-
- printk(KERN_ERR "cf-mips: wait not busy timeout (%dus)"
- ", status 0x%02x, state %d\n",
- to_us, (unsigned) rareg(ATA_REG_ST,dev), dev->tstate);
- return CF_TRANS_FAILED;
-}
-
-static irqreturn_t cf_irq_handler(int irq, void *dev_id)
-{
- /* While tasklet has not disabled irq, irq will be retried all the time
- * because of ILEVEL matching GPIO pin status => deadlock.
- * To avoid this, we change ILEVEL to 0.
- */
-
- struct cf_mips_dev *dev=dev_id;
-
- if (!cfrdy(dev))
- return; // false interrupt (only for ADM5120)
-
- INTC_WRITE(INTC_REG_INT_LEVEL, (INTC_READ(INTC_REG_INT_LEVEL) & (~ADM5120_CF_IRQ_LEVEL_BIT)));
-
- del_timer(&dev->to_timer);
- tasklet_schedule(&dev->tasklet);
- return IRQ_HANDLED;
-}
-
-static int do_reset(struct cf_mips_dev *dev)
-{
- printk(KERN_INFO "cf-mips: resetting..\n");
-
- wareg(ATA_REG_DC_SRST, ATA_REG_DC,dev);
- udelay(1); /* FIXME: how long should we wait here? */
- wareg(0, ATA_REG_DC,dev);
-
- return wait_not_busy(30 * SECS, 1,dev);
-}
-
-static int set_multiple(struct cf_mips_dev *dev)
-{
- if (dev->block_size <= 1)
- return CF_TRANS_OK;
-
- wareg(dev->block_size, ATA_REG_SC,dev);
- wareg(ATA_REG_DH_BASE | ATA_REG_DH_LBA, ATA_REG_DH,dev);
- wareg(ATA_CMD_SET_MULTIPLE, ATA_REG_CMD,dev);
-
- return wait_not_busy(10 * SECS, 1,dev);
-}
-
-static int set_cmd(struct cf_mips_dev *dev)
-{
- //DEBUGP(KERN_INFO "cf-mips: ata cmd 0x%02x\n", dev->tcmd);
- // sector_count should be <=24 bits..
- BUG_ON(dev->tsect_start>=0x10000000);
- // This way, it addresses 2^24 * 512 = 128G
-
- if (dev->tsector_count) {
- wareg(dev->tsector_count & 0xff, ATA_REG_SC,dev);
- wareg(dev->tsect_start & 0xff, ATA_REG_SN,dev);
- wareg((dev->tsect_start >> 8) & 0xff, ATA_REG_CL,dev);
- wareg((dev->tsect_start >> 16) & 0xff, ATA_REG_CH,dev);
- }
- wareg(((dev->tsect_start >> 24) & 0x0f) | ATA_REG_DH_BASE | ATA_REG_DH_LBA,
- ATA_REG_DH,dev); /* select drive on all commands */
- wareg(dev->tcmd, ATA_REG_CMD,dev);
- return wait_not_busy(10 * SECS, 1,dev);
-}
-
-static int do_trans(struct cf_mips_dev *dev)
-{
- int res;
- unsigned st;
- int transfered;
-
- //printk("do_trans: %d sectors left\n",dev->tsectors_left);
- while (dev->tsectors_left) {
- transfered = 0;
-
- st = rareg(ATA_REG_ST,dev);
- if (!(st & ATA_REG_ST_DRQ)) {
- printk(KERN_ERR "cf-mips: do_trans without DRQ (status 0x%x)!\n", st);
- if (st & ATA_REG_ST_ERR) {
- int errId = rareg(ATA_REG_ERR,dev);
- printk(KERN_ERR "cf-mips: %s error, status 0x%x, errid 0x%x\n",
- (dev->tread ? "read" : "write"), st, errId);
- }
- return CF_TRANS_FAILED;
- }
- do { /* Fill/read the buffer one block */
- u32 *qbuf, *qend;
- qbuf = (u32 *)dev->tbuf;
- qend = qbuf + CF_SECT_SIZE / sizeof(u32);
- if (dev->tread) {
- while (qbuf!=qend)
- put_unaligned(*DBUF32,qbuf++);
- //*(qbuf++) = *DBUF32;
- }
- else {
- while(qbuf!=qend)
- *DBUF32 = get_unaligned(qbuf++);
- }
-
- dev->tsectors_left--;
- dev->tbuf += CF_SECT_SIZE;
- dev->tbuf_size -= CF_SECT_SIZE;
- transfered++;
- } while (transfered != dev->block_size && dev->tsectors_left > 0);
-
- res = wait_not_busy(10 * SECS, 1,dev);
- if (res != CF_TRANS_OK)
- return res;
- };
-
- st = rareg(ATA_REG_ST,dev);
- if (st & (ATA_REG_ST_DRQ | ATA_REG_ST_DWF | ATA_REG_ST_ERR)) {
- if (st & ATA_REG_ST_DRQ) {
- printk(KERN_ERR "cf-mips: DRQ after all %d sectors are %s"
- ", status 0x%x\n", dev->tsector_count, (dev->tread ? "read" : "written"), st);
- } else if (st & ATA_REG_ST_DWF) {
- printk(KERN_ERR "cf-mips: write fault, status 0x%x\n", st);
- } else {
- int errId = rareg(ATA_REG_ERR,dev);
- printk(KERN_ERR "cf-mips: %s error, status 0x%x, errid 0x%x\n",
- (dev->tread ? "read" : "write"), st, errId);
- }
- return CF_TRANS_FAILED;
- }
- return CF_TRANS_OK;
-}
-
-static int cf_do_state(struct cf_mips_dev *dev)
-{
- int res;
- switch (dev->tstate) { /* fall through everywhere */
- case TS_IDLE:
- dev->tstate = TS_READY;
- if (is_busy(dev)) {
- dev->tstate = TS_AFTER_RESET;
- res = do_reset(dev);
- if (res != CF_TRANS_OK)
- break;
- }
- case TS_AFTER_RESET:
- if (dev->tstate == TS_AFTER_RESET) {
- dev->tstate = TS_READY;
- res = set_multiple(dev);
- if (res != CF_TRANS_OK)
- break;
- }
- case TS_READY:
- dev->tstate = TS_CMD;
- res = set_cmd(dev);
- if (res != CF_TRANS_OK)
- break;;
- case TS_CMD:
- dev->tstate = TS_TRANS;
- case TS_TRANS:
- res = do_trans(dev);
- break;
- default:
- printk(KERN_ERR "cf-mips: BUG: unknown tstate %d\n", dev->tstate);
- return CF_TRANS_FAILED;
- }
- if (res != CF_TRANS_IN_PROGRESS)
- dev->tstate = TS_IDLE;
- return res;
-}
-
-static void cf_do_tasklet(unsigned long dev_l)
-{
- struct cf_mips_dev* dev=(struct cf_mips_dev*) dev_l;
- int res;
-
- disable_irq(dev->irq);
-
- if (dev->tstate == TS_IDLE)
- return; /* can happen when irq is first registered */
-
-#if 0
- DEBUGP(KERN_WARNING "cf-mips: not busy ok (tasklet) status 0x%02x\n",
- (unsigned) rareg(ATA_REG_ST,dev));
-#endif
-
- res = cf_do_state(dev);
- if (res == CF_TRANS_IN_PROGRESS)
- return;
- cf_async_trans_done(dev,res);
-}
-
-static void cf_async_timeout(unsigned long dev_l)
-{
- struct cf_mips_dev* dev=(struct cf_mips_dev*) dev_l;
- disable_irq(dev->irq);
- /* Perhaps send abort to the device? */
- printk(KERN_ERR "cf-mips: wait not busy timeout (%lus)"
- ", status 0x%02x, state %d\n",
- jiffies - dev->irq_enable_time, (unsigned) rareg(ATA_REG_ST,dev), dev->tstate);
- dev->tstate = TS_IDLE;
- cf_async_trans_done(dev,CF_TRANS_FAILED);
-}
-
-int cf_do_transfer(struct cf_mips_dev* dev,sector_t sector, unsigned long nsect,
- char* buffer, int is_write)
-{
- BUG_ON(dev->tstate!=TS_IDLE);
- if (nsect > ATA_MAX_SECT_PER_CMD) {
- printk(KERN_WARNING "cf-mips: sector count %lu out of range\n",nsect);
- return CF_TRANS_FAILED;
- }
- if (sector + nsect > dev->sectors) {
- printk(KERN_WARNING "cf-mips: sector %lu out of range\n",sector);
- return CF_TRANS_FAILED;
- }
- dev->tbuf = buffer;
- dev->tbuf_size = nsect*512;
- dev->tsect_start = sector;
- dev->tsector_count = nsect;
- dev->tsectors_left = dev->tsector_count;
- dev->tread = (is_write)?0:1;
-
- dev->tcmd = (dev->block_size == 1 ?
- (is_write ? ATA_CMD_WRITE_SECTORS : ATA_CMD_READ_SECTORS) :
- (is_write ? ATA_CMD_WRITE_MULTIPLE : ATA_CMD_READ_MULTIPLE));
-
- return cf_do_state(dev);
-}
-
-static int do_identify(struct cf_mips_dev *dev)
-{
- u16 sbuf[CF_SECT_SIZE >> 1];
- int res;
- char tstr[17]; //serial
- BUG_ON(dev->tstate!=TS_IDLE);
- dev->tbuf = (char *) sbuf;
- dev->tbuf_size = CF_SECT_SIZE;
- dev->tsect_start = 0;
- dev->tsector_count = 0;
- dev->tsectors_left = 1;
- dev->tread = 1;
- dev->tcmd = ATA_CMD_IDENTIFY_DRIVE;
-
- DEBUGP(KERN_INFO "cf-mips: identify drive..\n");
- res = cf_do_state(dev);
- if (res == CF_TRANS_IN_PROGRESS) {
- printk(KERN_ERR "cf-mips: BUG: async identify cmd\n");
- return CF_TRANS_FAILED;
- }
- if (res != CF_TRANS_OK)
- return 0;
-
- dev->head = sbuf[3];
- dev->cyl = sbuf[1];
- dev->spt = sbuf[6];
- dev->sectors = ((unsigned long) sbuf[7] << 16) | sbuf[8];
- dev->dtype=sbuf[0];
- memcpy(tstr,&sbuf[12],16);
- tstr[16]=0;
- printk(KERN_INFO "cf-mips: %s detected, C/H/S=%d/%d/%d sectors=%u (%uMB) Serial=%s\n",
- (sbuf[0] == 0x848A ? "CF card" : "ATA drive"), dev->cyl, dev->head,
- dev->spt, dev->sectors, dev->sectors >> 11,tstr);
- return 1;
-}
-
-static void init_multiple(struct cf_mips_dev * dev)
-{
- int res;
- DEBUGP(KERN_INFO "cf-mips: detecting block size\n");
-
- dev->block_size = 128; /* max block size = 128 sectors (64KB) */
- do {
- wareg(dev->block_size, ATA_REG_SC,dev);
- wareg(ATA_REG_DH_BASE | ATA_REG_DH_LBA, ATA_REG_DH,dev);
- wareg(ATA_CMD_SET_MULTIPLE, ATA_REG_CMD,dev);
-
- res = wait_not_busy(10 * SECS, 1,dev);
- if (res != CF_TRANS_OK) {
- printk(KERN_ERR "cf-mips: failed to detect block size: busy!\n");
- dev->block_size = 1;
- return;
- }
- if ((rareg(ATA_REG_ST,dev) & ATA_REG_ST_ERR) == 0)
- break;
- dev->block_size /= 2;
- } while (dev->block_size > 1);
-
- printk(KERN_INFO "cf-mips: multiple sectors = %d\n", dev->block_size);
-}
-
-int cf_init(struct cf_mips_dev *dev)
-{
- tasklet_init(&dev->tasklet,cf_do_tasklet,(unsigned long)dev);
- dev->baddr = ioremap_nocache((unsigned long)dev->base, CFDEV_BUF_SIZE);
- if (!dev->baddr) {
- printk(KERN_ERR "cf-mips: cf_init: ioremap for (%lx,%x) failed\n",
- (unsigned long) dev->base, CFDEV_BUF_SIZE);
- return -EBUSY;
- }
-
- if (!cf_present(dev)) {
- printk(KERN_WARNING "cf-mips: cf card not present\n");
- iounmap(dev->baddr);
- return -ENODEV;
- }
-
- if (do_reset(dev) != CF_TRANS_OK) {
- printk(KERN_ERR "cf-mips: cf reset failed\n");
- iounmap(dev->baddr);
- return -EBUSY;
- }
-
- if (!do_identify(dev)) {
- printk(KERN_ERR "cf-mips: cf identify failed\n");
- iounmap(dev->baddr);
- return -EBUSY;
- }
-
-/* set_apm_level(ATA_APM_WITH_STANDBY); */
- init_multiple(dev);
-
- init_timer(&dev->to_timer);
- dev->to_timer.function = cf_async_timeout;
- dev->to_timer.data = (unsigned long)dev;
-
- prepare_cf_irq(dev);
- if (request_irq(dev->irq, cf_irq_handler, 0, "CF Mips", dev)) {
- printk(KERN_ERR "cf-mips: failed to get irq\n");
- iounmap(dev->baddr);
- return -EBUSY;
- }
- /* Disable below would be odd, because request will enable, and the tasklet
- will disable it itself */
- //disable_irq(dev->irq);
-
- dev->async_mode = 1;
-
- return 0;
-}
-
-void cf_cleanup(struct cf_mips_dev *dev)
-{
- iounmap(dev->baddr);
- free_irq(dev->irq, NULL);
-#if REQUEST_MEM_REGION
- release_mem_region((unsigned long)dev->base, CFDEV_BUF_SIZE);
-#endif
-}
-
-
-/*eof*/
+++ /dev/null
-/* CF-mips driver
- This is a block driver for the direct (mmaped) interface to the CF-slot,
- found in Routerboard.com's RB532 board
- See SDK provided from routerboard.com.
-
- Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
- Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
-
- This work is redistributed under the terms of the GNU General Public License.
-*/
-
-#ifndef __CFMIPS_ATA_H__
-#define __CFMIPS_ATA_H__
-
-#include <linux/interrupt.h>
-
-#define CFG_DC_DEV1 (void*)0xb8010010
-#define CFG_DC_DEVBASE 0x0
-#define CFG_DC_DEVMASK 0x4
-#define CFG_DC_DEVC 0x8
-#define CFG_DC_DEVTC 0xC
-
-#define CFDEV_BUF_SIZE 0x1000
-#define ATA_CIS_OFFSET 0x200
-#define ATA_REG_OFFSET 0x800
-#define ATA_DBUF_OFFSET 0xC00
-
-#define ATA_REG_FEAT 0x1
-#define ATA_REG_SC 0x2
-#define ATA_REG_SN 0x3
-#define ATA_REG_CL 0x4
-#define ATA_REG_CH 0x5
-#define ATA_REG_DH 0x6
-#define ATA_REG_DH_BASE 0xa0
-#define ATA_REG_DH_LBA 0x40
-#define ATA_REG_DH_DRV 0x10
-#define ATA_REG_CMD 0x7
-#define ATA_REG_ST 0x7
-#define ATA_REG_ST_BUSY 0x80
-#define ATA_REG_ST_RDY 0x40
-#define ATA_REG_ST_DWF 0x20
-#define ATA_REG_ST_DSC 0x10
-#define ATA_REG_ST_DRQ 0x08
-#define ATA_REG_ST_CORR 0x04
-#define ATA_REG_ST_ERR 0x01
-#define ATA_REG_ERR 0xd
-#define ATA_REG_DC 0xe
-#define ATA_REG_DC_IEN 0x02
-#define ATA_REG_DC_SRST 0x04
-
-#define ATA_CMD_READ_SECTORS 0x20
-#define ATA_CMD_WRITE_SECTORS 0x30
-#define ATA_CMD_EXEC_DRIVE_DIAG 0x90
-#define ATA_CMD_READ_MULTIPLE 0xC4
-#define ATA_CMD_WRITE_MULTIPLE 0xC5
-#define ATA_CMD_SET_MULTIPLE 0xC6
-#define ATA_CMD_IDENTIFY_DRIVE 0xEC
-#define ATA_CMD_SET_FEATURES 0xEF
-
-#define ATA_FEATURE_ENABLE_APM 0x05
-#define ATA_FEATURE_DISABLE_APM 0x85
-#define ATA_APM_DISABLED 0x00
-#define ATA_APM_MIN_POWER 0x01
-#define ATA_APM_WITH_STANDBY 0x7f
-#define ATA_APM_WITHOUT_STANDBY 0x80
-#define ATA_APM_MAX_PERFORMANCE 0xfe
-
-#define CF_SECT_SIZE 0x200
-/* That is the ratio CF_SECT_SIZE/512 (the kernel sector size) */
-#define CF_KERNEL_MUL 1
-#define ATA_MAX_SECT_PER_CMD 0x100
-
-#define CF_TRANS_FAILED 0
-#define CF_TRANS_OK 1
-#define CF_TRANS_IN_PROGRESS 2
-
-
-enum trans_state {
- TS_IDLE = 0,
- TS_AFTER_RESET,
- TS_READY,
- TS_CMD,
- TS_TRANS
-};
-
-//
-// #if DEBUG
-// static unsigned long busy_time;
-// #endif
-
-/** Struct to hold the cfdev
-Actually, all the data here only has one instance. However, for
-reasons of programming conformity, it is passed around as a pointer
-*/
-struct cf_mips_dev {
- void *base; /* base address for I/O */
- void *baddr; /* remapped address */
-
- int pin; /* gpio pin */
- int irq; /* gpio irq */
-
- unsigned head;
- unsigned cyl;
- unsigned spt;
- unsigned sectors;
-
- unsigned short block_size;
- unsigned dtype ; // ATA or CF
- struct request_queue *queue;
- struct gendisk *gd;
-
- /* Transaction state */
- enum trans_state tstate;
- char *tbuf;
- unsigned long tbuf_size;
- sector_t tsect_start;
- unsigned tsector_count;
- unsigned tsectors_left;
- int tread;
- unsigned tcmd;
- int async_mode;
- unsigned long irq_enable_time;
-
- struct request *active_req; /* A request is being carried out. Is that different from tstate? */
- int users;
- struct timer_list to_timer;
- struct tasklet_struct tasklet;
-
- /** This lock ensures that the requests to this device are all done
- atomically. Transfers can run in parallel, requests are all queued
- one-by-one */
- spinlock_t lock;
-};
-
-int cf_do_transfer(struct cf_mips_dev* dev,sector_t sector, unsigned long nsect,
- char* buffer, int is_write);
-int cf_init(struct cf_mips_dev* dev);
-void cf_cleanup(struct cf_mips_dev* dev);
-
-void cf_async_trans_done(struct cf_mips_dev* dev, int result);
-// void *cf_get_next_buf(unsigned long *buf_size);
-
-#endif
+++ /dev/null
-/* CF-mips driver
- This is a block driver for the direct (mmaped) interface to the CF-slot,
- found in Routerboard.com's RB532 board
- See SDK provided from routerboard.com.
-
- Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
- Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
-
- This work is redistributed under the terms of the GNU General Public License.
-*/
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/time.h>
-#include <linux/wait.h>
-#include <linux/fs.h>
-#include <linux/genhd.h>
-#include <linux/blkdev.h>
-#include <linux/blkpg.h>
-#include <linux/hdreg.h>
-#include <linux/platform_device.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/mach-adm5120/adm5120_cf.h>
-
-#ifdef DEBUG
-#define DEBUGP printk
-#define DLEVEL 1
-#else
-#define DEBUGP(format, args...)
-#define DLEVEL 0
-#endif
-
-#define CF_MIPS_MAJOR 13
-#define MAJOR_NR CF_MIPS_MAJOR
-#define CF_MAX_PART 16 /* max 15 partitions */
-
-#include "ata.h"
-
-//extern struct block_device_operations cf_bdops;
-
-// static struct hd_struct cf_parts[CF_MAX_PART];
-// static int cf_part_sizes[CF_MAX_PART];
-// static int cf_hsect_sizes[CF_MAX_PART];
-// static int cf_max_sectors[CF_MAX_PART];
-// static int cf_blksize_sizes[CF_MAX_PART];
-
-// static spinlock_t lock = SPIN_LOCK_UNLOCKED;
-
-// volatile int cf_busy = 0;
-
-static struct request *active_req = NULL;
-
-static int cf_open (struct inode *, struct file *);
-static int cf_release (struct inode *, struct file *);
-static int cf_ioctl (struct inode *, struct file *, unsigned, unsigned long);
-
-static void cf_request(request_queue_t * q);
-static int cf_transfer(const struct request *req);
-
-/*long (*unlocked_ioctl) (struct file *, unsigned, unsigned long);
-long (*compat_ioctl) (struct file *, unsigned, unsigned long);*/
-// int (*direct_access) (struct block_device *, sector_t, unsigned long *);
-// int (*media_changed) (struct gendisk *);
-// int (*revalidate_disk) (struct gendisk *);
-
-static struct block_device_operations cf_bdops = {
- .owner = THIS_MODULE,
- .open = cf_open,
- .release = cf_release,
- .ioctl = cf_ioctl,
- .media_changed = NULL,
- .unlocked_ioctl = NULL,
- .revalidate_disk = NULL,
- .compat_ioctl = NULL,
- .direct_access = NULL
-};
-
-
-int cf_mips_probe(struct platform_device *pdev)
-{
- struct gendisk* cf_gendisk=NULL;
- struct cf_device *cdev = (struct cf_device *) pdev->dev.platform_data;
- struct cf_mips_dev *dev;
- struct resource *r;
- int reg_result;
-
- reg_result = register_blkdev(MAJOR_NR, "cf-mips");
- if (reg_result < 0) {
- printk(KERN_WARNING "cf-mips: can't get major %d\n", MAJOR_NR);
- return reg_result;
- }
-
- dev = (struct cf_mips_dev *)kzalloc(sizeof(struct cf_mips_dev),GFP_KERNEL);
- if (!dev)
- goto out_err;
-
- cdev->dev = dev;
-
- dev->pin = cdev->gpio_pin;
- dev->irq = platform_get_irq_byname(pdev, "cf_irq");
- r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cf_membase");
- dev->base = (void *) r->start;
-
- if (cf_init(dev))
- goto out_err;
- printk(KERN_INFO "cf-mips: init done\n");
-
- spin_lock_init(&dev->lock);
- dev->queue = blk_init_queue(cf_request,&dev->lock);
- if (!dev->queue){
- printk(KERN_ERR "cf-mips: no mem for queue\n");
- goto out_err;
- }
- blk_queue_max_sectors(dev->queue,ATA_MAX_SECT_PER_CMD);
-
- /* For memory devices, it is always better to avoid crossing segments
- inside the same request. */
-/* if (dev->dtype==0x848A){
- printk(KERN_INFO "Setting boundary for cf to 0x%x",(dev->block_size*512)-1);
- blk_queue_segment_boundary(dev->queue, (dev->block_size*512)-1);
- }*/
-
- dev->gd = alloc_disk(CF_MAX_PART);
- cf_gendisk = dev->gd;
- cdev->gd = dev->gd;
-
- if (!cf_gendisk)
- goto out_err; /* Last of these goto's */
-
- cf_gendisk->major = MAJOR_NR;
- cf_gendisk->first_minor = 0;
- cf_gendisk->queue=dev->queue;
- BUG_ON(cf_gendisk->minors != CF_MAX_PART);
- strcpy(cf_gendisk->disk_name,"cfa");
- cf_gendisk->fops = &cf_bdops;
- cf_gendisk->flags = 0 ; /* is not yet GENHD_FL_REMOVABLE */
- cf_gendisk->private_data=dev;
-
- set_capacity(cf_gendisk,dev->sectors * CF_KERNEL_MUL);
-
- /* Let the disk go live */
- add_disk(cf_gendisk);
-#if 0
- result = cf_init();
-
- /* default cfg for all partitions */
- memset(cf_parts, 0, sizeof (cf_parts[0]) * CF_MAX_PART);
- memset(cf_part_sizes, 0, sizeof (cf_part_sizes[0]) * CF_MAX_PART);
- for (i = 0; i < CF_MAX_PART; ++i) {
- cf_hsect_sizes[i] = CF_SECT_SIZE;
- cf_max_sectors[i] = ATA_MAX_SECT_PER_CMD;
- cf_blksize_sizes[i] = BLOCK_SIZE;
- }
-
- /* setup info for whole disk (partition 0) */
- cf_part_sizes[0] = cf_sectors / 2;
- cf_parts[0].nr_sects = cf_sectors;
-
- blk_size[MAJOR_NR] = cf_part_sizes;
- blksize_size[MAJOR_NR] = cf_blksize_sizes;
- max_sectors[MAJOR_NR] = cf_max_sectors;
- hardsect_size[MAJOR_NR] = cf_hsect_sizes;
- read_ahead[MAJOR_NR] = 8; /* (4kB) */
-
- blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), DEVICE_REQUEST);
-
- add_gendisk(&cf_gendisk);
-#endif
-// printk(KERN_INFO "cf-mips partition check: \n");
-// register_disk(cf_gendisk, MKDEV(MAJOR_NR, 0), CF_MAX_PART,
-// &cf_bdops, dev->sectors);
- return 0;
-
-out_err:
- if (dev->queue){
- blk_cleanup_queue(dev->queue);
- }
- if (reg_result) {
- unregister_blkdev(MAJOR_NR, "cf-mips");
- return reg_result;
- }
- if (dev){
- cf_cleanup(dev);
- kfree(dev);
- }
- return 1;
-}
-
-static int
-cf_mips_remove(struct platform_device *pdev)
-{
- struct cf_device *cdev = (struct cf_device *) pdev->dev.platform_data;
- struct cf_mips_dev *dev = (struct cf_mips_dev *) cdev->dev;
-
- unregister_blkdev(MAJOR_NR, "cf-mips");
- blk_cleanup_queue(dev->queue);
-
- del_gendisk(dev->gd);
- cf_cleanup(dev);
- return 0;
-}
-
-
-static struct platform_driver cf_driver = {
- .driver.name = "rb153-cf",
- .probe = cf_mips_probe,
- .remove = cf_mips_remove,
-};
-
-static int __init cf_mips_init(void)
-{
- printk(KERN_INFO "cf-mips module loaded\n");
- return platform_driver_register(&cf_driver);
-}
-
-static void cf_mips_cleanup(void)
-{
- platform_driver_unregister(&cf_driver);
- printk(KERN_INFO "cf-mips module removed\n");
-}
-
-module_init(cf_mips_init);
-module_exit(cf_mips_cleanup);
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_BLOCKDEV_MAJOR(CF_MIPS_MAJOR);
-
-
-static int cf_open(struct inode *inode, struct file *filp)
-{
- struct cf_mips_dev *dev=inode->i_bdev->bd_disk->private_data;
- int minor = MINOR(inode->i_rdev);
-
- if (minor >= CF_MAX_PART)
- return -ENODEV;
- //DEBUGP(KERN_INFO "cf-mips module opened, minor %d\n", minor);
- spin_lock(&dev->lock);
- dev->users++;
- spin_unlock(&dev->lock);
- filp->private_data=dev;
-
- /* dirty workaround to set CFRDY GPIO as an input when some other
- program sets it as an output */
- //gpio_set(CFG, (1 << dev->pin), 0);
- return 0; /* success */
-}
-
-static int cf_release(struct inode *inode, struct file *filp)
-{
- int minor = MINOR(inode->i_rdev);
- struct cf_mips_dev *dev=inode->i_bdev->bd_disk->private_data;
- spin_lock(&dev->lock);
- dev->users--;
- spin_unlock(&dev->lock);
- return 0;
-}
-
-static int cf_ioctl(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- unsigned minor = MINOR(inode->i_rdev);
- struct cf_mips_dev *dev=inode->i_bdev->bd_disk->private_data;
-
- DEBUGP(KERN_INFO "cf_ioctl cmd %u\n", cmd);
- switch (cmd) {
- case BLKRRPART: /* re-read partition table */
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- printk(KERN_INFO "cf-mips partition check: \n");
- register_disk(dev->gd);
- return 0;
-
- case HDIO_GETGEO:
- {
- struct hd_geometry geo;
- geo.cylinders = dev->cyl;
- geo.heads = dev->head;
- geo.sectors = dev->spt;
- geo.start = (*dev->gd->part)[minor].start_sect;
- if (copy_to_user((void *) arg, &geo, sizeof (geo)))
- return -EFAULT;
- }
- return 0;
- }
-
- return -EINVAL; /* unknown command */
-}
-
-static void cf_request(request_queue_t * q)
-{
- struct cf_mips_dev* dev;
-
- struct request * req;
- int status;
-
- /* We could have q->queuedata = dev , but haven't yet. */
- if (active_req)
- return;
-
- while ((req=elv_next_request(q))!=NULL){
- dev=req->rq_disk->private_data;
- status=cf_transfer(req);
- if (status==CF_TRANS_IN_PROGRESS){
- active_req=req;
- return;
- }
- end_request(req,status);
- }
-}
-
-static int cf_transfer(const struct request *req)
-{
- struct cf_mips_dev* dev=req->rq_disk->private_data;
-
- if (!blk_fs_request(req)){
- if (printk_ratelimit())
- printk(KERN_WARNING "cf-mips: skipping non-fs request 0x%x\n",req->cmd[0]);
- return CF_TRANS_FAILED;
- }
-
- return cf_do_transfer(dev,req->sector,req->current_nr_sectors,req->buffer,rq_data_dir(req));
-}
-
-void cf_async_trans_done(struct cf_mips_dev * dev,int result)
-{
- struct request *req;
-
- spin_lock(&dev->lock);
- req=active_req;
- active_req=NULL;
- end_request(req,result);
- spin_unlock(&dev->lock);
-
- spin_lock(&dev->lock);
- cf_request(dev->queue);
- spin_unlock(&dev->lock);
-}
-
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