+++ /dev/null
-/*
- * Copyright (c) 2004 Picture Elements, Inc.
- * Stephen Williams (XXXXXXXXXXXXXXXX)
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-/*
- * The Xilinx SystemACE chip support is activated by defining
- * CONFIG_SYSTEMACE to turn on support, and CONFIG_SYS_SYSTEMACE_BASE
- * to set the base address of the device. This code currently
- * assumes that the chip is connected via a byte-wide bus.
- *
- * The CONFIG_SYSTEMACE also adds to fat support the device class
- * "ace" that allows the user to execute "fatls ace 0" and the
- * like. This works by making the systemace_get_dev function
- * available to cmd_fat.c:get_dev and filling in a block device
- * description that has all the bits needed for FAT support to
- * read sectors.
- *
- * According to Xilinx technical support, before accessing the
- * SystemACE CF you need to set the following control bits:
- * FORCECFGMODE : 1
- * CFGMODE : 0
- * CFGSTART : 0
- */
-
-#include <common.h>
-#include <command.h>
-#include <dm.h>
-#include <part.h>
-#include <asm/io.h>
-
-/*
- * The ace_readw and writew functions read/write 16bit words, but the
- * offset value is the BYTE offset as most used in the Xilinx
- * datasheet for the SystemACE chip. The CONFIG_SYS_SYSTEMACE_BASE is defined
- * to be the base address for the chip, usually in the local
- * peripheral bus.
- */
-
-static u32 base = CONFIG_SYS_SYSTEMACE_BASE;
-static u32 width = CONFIG_SYS_SYSTEMACE_WIDTH;
-
-static void ace_writew(u16 val, unsigned off)
-{
- if (width == 8) {
-#if !defined(__BIG_ENDIAN)
- writeb(val >> 8, base + off);
- writeb(val, base + off + 1);
-#else
- writeb(val, base + off);
- writeb(val >> 8, base + off + 1);
-#endif
- } else
- out16(base + off, val);
-}
-
-static u16 ace_readw(unsigned off)
-{
- if (width == 8) {
-#if !defined(__BIG_ENDIAN)
- return (readb(base + off) << 8) | readb(base + off + 1);
-#else
- return readb(base + off) | (readb(base + off + 1) << 8);
-#endif
- }
-
- return in16(base + off);
-}
-
-#ifndef CONFIG_BLK
-static struct blk_desc systemace_dev = { 0 };
-#endif
-
-static int get_cf_lock(void)
-{
- int retry = 10;
-
- /* CONTROLREG = LOCKREG */
- unsigned val = ace_readw(0x18);
- val |= 0x0002;
- ace_writew((val & 0xffff), 0x18);
-
- /* Wait for MPULOCK in STATUSREG[15:0] */
- while (!(ace_readw(0x04) & 0x0002)) {
-
- if (retry < 0)
- return -1;
-
- udelay(100000);
- retry -= 1;
- }
-
- return 0;
-}
-
-static void release_cf_lock(void)
-{
- unsigned val = ace_readw(0x18);
- val &= ~(0x0002);
- ace_writew((val & 0xffff), 0x18);
-}
-
-/*
- * This function is called (by dereferencing the block_read pointer in
- * the dev_desc) to read blocks of data. The return value is the
- * number of blocks read. A zero return indicates an error.
- */
-#ifdef CONFIG_BLK
-static unsigned long systemace_read(struct udevice *dev, unsigned long start,
- lbaint_t blkcnt, void *buffer)
-#else
-static unsigned long systemace_read(struct blk_desc *block_dev,
- unsigned long start, lbaint_t blkcnt,
- void *buffer)
-#endif
-{
- int retry;
- unsigned blk_countdown;
- unsigned char *dp = buffer;
- unsigned val;
-
- if (get_cf_lock() < 0) {
- unsigned status = ace_readw(0x04);
-
- /* If CFDETECT is false, card is missing. */
- if (!(status & 0x0010)) {
- printf("** CompactFlash card not present. **\n");
- return 0;
- }
-
- printf("**** ACE locked away from me (STATUSREG=%04x)\n",
- status);
- return 0;
- }
-#ifdef DEBUG_SYSTEMACE
- printf("... systemace read %lu sectors at %lu\n", blkcnt, start);
-#endif
-
- retry = 2000;
- for (;;) {
- val = ace_readw(0x04);
-
- /* If CFDETECT is false, card is missing. */
- if (!(val & 0x0010)) {
- printf("**** ACE CompactFlash not found.\n");
- release_cf_lock();
- return 0;
- }
-
- /* If RDYFORCMD, then we are ready to go. */
- if (val & 0x0100)
- break;
-
- if (retry < 0) {
- printf("**** SystemACE not ready.\n");
- release_cf_lock();
- return 0;
- }
-
- udelay(1000);
- retry -= 1;
- }
-
- /* The SystemACE can only transfer 256 sectors at a time, so
- limit the current chunk of sectors. The blk_countdown
- variable is the number of sectors left to transfer. */
-
- blk_countdown = blkcnt;
- while (blk_countdown > 0) {
- unsigned trans = blk_countdown;
-
- if (trans > 256)
- trans = 256;
-
-#ifdef DEBUG_SYSTEMACE
- printf("... transfer %lu sector in a chunk\n", trans);
-#endif
- /* Write LBA block address */
- ace_writew((start >> 0) & 0xffff, 0x10);
- ace_writew((start >> 16) & 0x0fff, 0x12);
-
- /* NOTE: in the Write Sector count below, a count of 0
- causes a transfer of 256, so &0xff gives the right
- value for whatever transfer count we want. */
-
- /* Write sector count | ReadMemCardData. */
- ace_writew((trans & 0xff) | 0x0300, 0x14);
-
-/*
- * For FPGA configuration via SystemACE is reset unacceptable
- * CFGDONE bit in STATUSREG is not set to 1.
- */
-#ifndef SYSTEMACE_CONFIG_FPGA
- /* Reset the configruation controller */
- val = ace_readw(0x18);
- val |= 0x0080;
- ace_writew(val, 0x18);
-#endif
-
- retry = trans * 16;
- while (retry > 0) {
- int idx;
-
- /* Wait for buffer to become ready. */
- while (!(ace_readw(0x04) & 0x0020)) {
- udelay(100);
- }
-
- /* Read 16 words of 2bytes from the sector buffer. */
- for (idx = 0; idx < 16; idx += 1) {
- unsigned short val = ace_readw(0x40);
- *dp++ = val & 0xff;
- *dp++ = (val >> 8) & 0xff;
- }
-
- retry -= 1;
- }
-
- /* Clear the configruation controller reset */
- val = ace_readw(0x18);
- val &= ~0x0080;
- ace_writew(val, 0x18);
-
- /* Count the blocks we transfer this time. */
- start += trans;
- blk_countdown -= trans;
- }
-
- release_cf_lock();
-
- return blkcnt;
-}
-
-#ifdef CONFIG_BLK
-static int systemace_bind(struct udevice *dev)
-{
- struct blk_desc *bdesc;
- struct udevice *bdev;
- int ret;
-
- ret = blk_create_devicef(dev, "systemace_blk", "blk", IF_TYPE_SYSTEMACE,
- -1, 512, 0, &bdev);
- if (ret) {
- debug("Cannot create block device\n");
- return ret;
- }
- bdesc = dev_get_uclass_platdata(bdev);
- bdesc->removable = 1;
- bdesc->part_type = PART_TYPE_UNKNOWN;
- bdesc->log2blksz = LOG2(bdesc->blksz);
-
- /* Ensure the correct bus mode (8/16 bits) gets enabled */
- ace_writew(width == 8 ? 0 : 0x0001, 0);
-
- return 0;
-}
-
-static const struct blk_ops systemace_blk_ops = {
- .read = systemace_read,
-};
-
-U_BOOT_DRIVER(systemace_blk) = {
- .name = "systemace_blk",
- .id = UCLASS_BLK,
- .ops = &systemace_blk_ops,
- .bind = systemace_bind,
-};
-#else
-static int systemace_get_dev(int dev, struct blk_desc **descp)
-{
- /* The first time through this, the systemace_dev object is
- not yet initialized. In that case, fill it in. */
- if (systemace_dev.blksz == 0) {
- systemace_dev.if_type = IF_TYPE_UNKNOWN;
- systemace_dev.devnum = 0;
- systemace_dev.part_type = PART_TYPE_UNKNOWN;
- systemace_dev.type = DEV_TYPE_HARDDISK;
- systemace_dev.blksz = 512;
- systemace_dev.log2blksz = LOG2(systemace_dev.blksz);
- systemace_dev.removable = 1;
- systemace_dev.block_read = systemace_read;
-
- /*
- * Ensure the correct bus mode (8/16 bits) gets enabled
- */
- ace_writew(width == 8 ? 0 : 0x0001, 0);
-
- part_init(&systemace_dev);
- }
- *descp = &systemace_dev;
-
- return 0;
-}
-
-U_BOOT_LEGACY_BLK(systemace) = {
- .if_typename = "ace",
- .if_type = IF_TYPE_SYSTEMACE,
- .max_devs = 1,
- .get_dev = systemace_get_dev,
-};
-#endif
projects / oweals / u-boot.git / commitdiff