u-boot/drivers/qe/qe.c
Jean-Christophe PLAGNIOL-VILLARD 7ba44a5521 drivers/qe: Move conditional compilation to Makefile
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-08-13 01:40:41 +02:00

468 lines
11 KiB
C

/*
* Copyright (C) 2006 Freescale Semiconductor, Inc.
*
* Dave Liu <daveliu@freescale.com>
* based on source code of Shlomi Gridish
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include "common.h"
#include <command.h>
#include "asm/errno.h"
#include "asm/io.h"
#include "asm/immap_qe.h"
#include "qe.h"
qe_map_t *qe_immr = NULL;
static qe_snum_t snums[QE_NUM_OF_SNUM];
DECLARE_GLOBAL_DATA_PTR;
void qe_issue_cmd(uint cmd, uint sbc, u8 mcn, u32 cmd_data)
{
u32 cecr;
if (cmd == QE_RESET) {
out_be32(&qe_immr->cp.cecr,(u32) (cmd | QE_CR_FLG));
} else {
out_be32(&qe_immr->cp.cecdr, cmd_data);
out_be32(&qe_immr->cp.cecr, (sbc | QE_CR_FLG |
((u32) mcn<<QE_CR_PROTOCOL_SHIFT) | cmd));
}
/* Wait for the QE_CR_FLG to clear */
do {
cecr = in_be32(&qe_immr->cp.cecr);
} while (cecr & QE_CR_FLG);
return;
}
uint qe_muram_alloc(uint size, uint align)
{
uint retloc;
uint align_mask, off;
uint savebase;
align_mask = align - 1;
savebase = gd->mp_alloc_base;
if ((off = (gd->mp_alloc_base & align_mask)) != 0)
gd->mp_alloc_base += (align - off);
if ((off = size & align_mask) != 0)
size += (align - off);
if ((gd->mp_alloc_base + size) >= gd->mp_alloc_top) {
gd->mp_alloc_base = savebase;
printf("%s: ran out of ram.\n", __FUNCTION__);
}
retloc = gd->mp_alloc_base;
gd->mp_alloc_base += size;
memset((void *)&qe_immr->muram[retloc], 0, size);
__asm__ __volatile__("sync");
return retloc;
}
void *qe_muram_addr(uint offset)
{
return (void *)&qe_immr->muram[offset];
}
static void qe_sdma_init(void)
{
volatile sdma_t *p;
uint sdma_buffer_base;
p = (volatile sdma_t *)&qe_immr->sdma;
/* All of DMA transaction in bus 1 */
out_be32(&p->sdaqr, 0);
out_be32(&p->sdaqmr, 0);
/* Allocate 2KB temporary buffer for sdma */
sdma_buffer_base = qe_muram_alloc(2048, 4096);
out_be32(&p->sdwbcr, sdma_buffer_base & QE_SDEBCR_BA_MASK);
/* Clear sdma status */
out_be32(&p->sdsr, 0x03000000);
/* Enable global mode on bus 1, and 2KB buffer size */
out_be32(&p->sdmr, QE_SDMR_GLB_1_MSK | (0x3 << QE_SDMR_CEN_SHIFT));
}
static u8 thread_snum[QE_NUM_OF_SNUM] = {
0x04, 0x05, 0x0c, 0x0d,
0x14, 0x15, 0x1c, 0x1d,
0x24, 0x25, 0x2c, 0x2d,
0x34, 0x35, 0x88, 0x89,
0x98, 0x99, 0xa8, 0xa9,
0xb8, 0xb9, 0xc8, 0xc9,
0xd8, 0xd9, 0xe8, 0xe9
};
static void qe_snums_init(void)
{
int i;
for (i = 0; i < QE_NUM_OF_SNUM; i++) {
snums[i].state = QE_SNUM_STATE_FREE;
snums[i].num = thread_snum[i];
}
}
int qe_get_snum(void)
{
int snum = -EBUSY;
int i;
for (i = 0; i < QE_NUM_OF_SNUM; i++) {
if (snums[i].state == QE_SNUM_STATE_FREE) {
snums[i].state = QE_SNUM_STATE_USED;
snum = snums[i].num;
break;
}
}
return snum;
}
void qe_put_snum(u8 snum)
{
int i;
for (i = 0; i < QE_NUM_OF_SNUM; i++) {
if (snums[i].num == snum) {
snums[i].state = QE_SNUM_STATE_FREE;
break;
}
}
}
void qe_init(uint qe_base)
{
/* Init the QE IMMR base */
qe_immr = (qe_map_t *)qe_base;
gd->mp_alloc_base = QE_DATAONLY_BASE;
gd->mp_alloc_top = gd->mp_alloc_base + QE_DATAONLY_SIZE;
qe_sdma_init();
qe_snums_init();
}
void qe_reset(void)
{
qe_issue_cmd(QE_RESET, QE_CR_SUBBLOCK_INVALID,
(u8) QE_CR_PROTOCOL_UNSPECIFIED, 0);
}
void qe_assign_page(uint snum, uint para_ram_base)
{
u32 cecr;
out_be32(&qe_immr->cp.cecdr, para_ram_base);
out_be32(&qe_immr->cp.cecr, ((u32) snum<<QE_CR_ASSIGN_PAGE_SNUM_SHIFT)
| QE_CR_FLG | QE_ASSIGN_PAGE);
/* Wait for the QE_CR_FLG to clear */
do {
cecr = in_be32(&qe_immr->cp.cecr);
} while (cecr & QE_CR_FLG );
return;
}
/*
* brg: 0~15 as BRG1~BRG16
rate: baud rate
* BRG input clock comes from the BRGCLK (internal clock generated from
the QE clock, it is one-half of the QE clock), If need the clock source
from CLKn pin, we have te change the function.
*/
#define BRG_CLK (gd->brg_clk)
int qe_set_brg(uint brg, uint rate)
{
volatile uint *bp;
u32 divisor;
int div16 = 0;
if (brg >= QE_NUM_OF_BRGS)
return -EINVAL;
bp = (uint *)&qe_immr->brg.brgc1;
bp += brg;
divisor = (BRG_CLK / rate);
if (divisor > QE_BRGC_DIVISOR_MAX + 1) {
div16 = 1;
divisor /= 16;
}
*bp = ((divisor - 1) << QE_BRGC_DIVISOR_SHIFT) | QE_BRGC_ENABLE;
__asm__ __volatile__("sync");
if (div16) {
*bp |= QE_BRGC_DIV16;
__asm__ __volatile__("sync");
}
return 0;
}
/* Set ethernet MII clock master
*/
int qe_set_mii_clk_src(int ucc_num)
{
u32 cmxgcr;
/* check if the UCC number is in range. */
if ((ucc_num > UCC_MAX_NUM - 1) || (ucc_num < 0)) {
printf("%s: ucc num not in ranges\n", __FUNCTION__);
return -EINVAL;
}
cmxgcr = in_be32(&qe_immr->qmx.cmxgcr);
cmxgcr &= ~QE_CMXGCR_MII_ENET_MNG_MASK;
cmxgcr |= (ucc_num <<QE_CMXGCR_MII_ENET_MNG_SHIFT);
out_be32(&qe_immr->qmx.cmxgcr, cmxgcr);
return 0;
}
/* The maximum number of RISCs we support */
#define MAX_QE_RISC 2
/* Firmware information stored here for qe_get_firmware_info() */
static struct qe_firmware_info qe_firmware_info;
/*
* Set to 1 if QE firmware has been uploaded, and therefore
* qe_firmware_info contains valid data.
*/
static int qe_firmware_uploaded;
/*
* Upload a QE microcode
*
* This function is a worker function for qe_upload_firmware(). It does
* the actual uploading of the microcode.
*/
static void qe_upload_microcode(const void *base,
const struct qe_microcode *ucode)
{
const u32 *code = base + be32_to_cpu(ucode->code_offset);
unsigned int i;
if (ucode->major || ucode->minor || ucode->revision)
printf("QE: uploading microcode '%s' version %u.%u.%u\n",
ucode->id, ucode->major, ucode->minor, ucode->revision);
else
printf("QE: uploading microcode '%s'\n", ucode->id);
/* Use auto-increment */
out_be32(&qe_immr->iram.iadd, be32_to_cpu(ucode->iram_offset) |
QE_IRAM_IADD_AIE | QE_IRAM_IADD_BADDR);
for (i = 0; i < be32_to_cpu(ucode->count); i++)
out_be32(&qe_immr->iram.idata, be32_to_cpu(code[i]));
}
/*
* Upload a microcode to the I-RAM at a specific address.
*
* See docs/README.qe_firmware for information on QE microcode uploading.
*
* Currently, only version 1 is supported, so the 'version' field must be
* set to 1.
*
* The SOC model and revision are not validated, they are only displayed for
* informational purposes.
*
* 'calc_size' is the calculated size, in bytes, of the firmware structure and
* all of the microcode structures, minus the CRC.
*
* 'length' is the size that the structure says it is, including the CRC.
*/
int qe_upload_firmware(const struct qe_firmware *firmware)
{
unsigned int i;
unsigned int j;
u32 crc;
size_t calc_size = sizeof(struct qe_firmware);
size_t length;
const struct qe_header *hdr;
if (!firmware) {
printf("Invalid address\n");
return -EINVAL;
}
hdr = &firmware->header;
length = be32_to_cpu(hdr->length);
/* Check the magic */
if ((hdr->magic[0] != 'Q') || (hdr->magic[1] != 'E') ||
(hdr->magic[2] != 'F')) {
printf("Not a microcode\n");
return -EPERM;
}
/* Check the version */
if (hdr->version != 1) {
printf("Unsupported version\n");
return -EPERM;
}
/* Validate some of the fields */
if ((firmware->count < 1) || (firmware->count > MAX_QE_RISC)) {
printf("Invalid data\n");
return -EINVAL;
}
/* Validate the length and check if there's a CRC */
calc_size += (firmware->count - 1) * sizeof(struct qe_microcode);
for (i = 0; i < firmware->count; i++)
/*
* For situations where the second RISC uses the same microcode
* as the first, the 'code_offset' and 'count' fields will be
* zero, so it's okay to add those.
*/
calc_size += sizeof(u32) *
be32_to_cpu(firmware->microcode[i].count);
/* Validate the length */
if (length != calc_size + sizeof(u32)) {
printf("Invalid length\n");
return -EPERM;
}
/*
* Validate the CRC. We would normally call crc32_no_comp(), but that
* function isn't available unless you turn on JFFS support.
*/
crc = be32_to_cpu(*(u32 *)((void *)firmware + calc_size));
if (crc != (crc32(-1, (const void *) firmware, calc_size) ^ -1)) {
printf("Firmware CRC is invalid\n");
return -EIO;
}
/*
* If the microcode calls for it, split the I-RAM.
*/
if (!firmware->split) {
out_be16(&qe_immr->cp.cercr,
in_be16(&qe_immr->cp.cercr) | QE_CP_CERCR_CIR);
}
if (firmware->soc.model)
printf("Firmware '%s' for %u V%u.%u\n",
firmware->id, be16_to_cpu(firmware->soc.model),
firmware->soc.major, firmware->soc.minor);
else
printf("Firmware '%s'\n", firmware->id);
/*
* The QE only supports one microcode per RISC, so clear out all the
* saved microcode information and put in the new.
*/
memset(&qe_firmware_info, 0, sizeof(qe_firmware_info));
strcpy(qe_firmware_info.id, (char *)firmware->id);
qe_firmware_info.extended_modes = firmware->extended_modes;
memcpy(qe_firmware_info.vtraps, firmware->vtraps,
sizeof(firmware->vtraps));
qe_firmware_uploaded = 1;
/* Loop through each microcode. */
for (i = 0; i < firmware->count; i++) {
const struct qe_microcode *ucode = &firmware->microcode[i];
/* Upload a microcode if it's present */
if (ucode->code_offset)
qe_upload_microcode(firmware, ucode);
/* Program the traps for this processor */
for (j = 0; j < 16; j++) {
u32 trap = be32_to_cpu(ucode->traps[j]);
if (trap)
out_be32(&qe_immr->rsp[i].tibcr[j], trap);
}
/* Enable traps */
out_be32(&qe_immr->rsp[i].eccr, be32_to_cpu(ucode->eccr));
}
return 0;
}
struct qe_firmware_info *qe_get_firmware_info(void)
{
return qe_firmware_uploaded ? &qe_firmware_info : NULL;
}
static int qe_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
ulong addr;
if (argc < 3) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
if (strcmp(argv[1], "fw") == 0) {
addr = simple_strtoul(argv[2], NULL, 16);
if (!addr) {
printf("Invalid address\n");
return -EINVAL;
}
/*
* If a length was supplied, compare that with the 'length'
* field.
*/
if (argc > 3) {
ulong length = simple_strtoul(argv[3], NULL, 16);
struct qe_firmware *firmware = (void *) addr;
if (length != be32_to_cpu(firmware->header.length)) {
printf("Length mismatch\n");
return -EINVAL;
}
}
return qe_upload_firmware((const struct qe_firmware *) addr);
}
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
U_BOOT_CMD(
qe, 4, 0, qe_cmd,
"qe - QUICC Engine commands\n",
"fw <addr> [<length>] - Upload firmware binary at address <addr> to "
"the QE,\n\twith optional length <length> verification.\n"
);