/*
* Copyright 2011 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Alex Deucher
*/
#include <linux/firmware.h>
#include "radeon.h"
#include "cikd.h"
#include "ppsmc.h"
#include "radeon_ucode.h"
#include "ci_dpm.h"
static int ci_set_smc_sram_address(struct radeon_device *rdev,
u32 smc_address, u32 limit)
{
if (smc_address & 3)
return -EINVAL;
if ((smc_address + 3) > limit)
return -EINVAL;
WREG32(SMC_IND_INDEX_0, smc_address);
WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
return 0;
}
int ci_copy_bytes_to_smc(struct radeon_device *rdev,
u32 smc_start_address,
const u8 *src, u32 byte_count, u32 limit)
{
unsigned long flags;
u32 data, original_data;
u32 addr;
u32 extra_shift;
int ret = 0;
if (smc_start_address & 3)
return -EINVAL;
if ((smc_start_address + byte_count) > limit)
return -EINVAL;
addr = smc_start_address;
spin_lock_irqsave(&rdev->smc_idx_lock, flags);
while (byte_count >= 4) {
/* SMC address space is BE */
data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
ret = ci_set_smc_sram_address(rdev, addr, limit);
if (ret)
goto done;
WREG32(SMC_IND_DATA_0, data);
src += 4;
byte_count -= 4;
addr += 4;
}
/* RMW for the final bytes */
if (byte_count > 0) {
data = 0;
ret = ci_set_smc_sram_address(rdev, addr, limit);
if (ret)
goto done;
original_data = RREG32(SMC_IND_DATA_0);
extra_shift = 8 * (4 - byte_count);
while (byte_count > 0) {
data = (data << 8) + *src++;
byte_count--;
}
data <<= extra_shift;
data |= (original_data & ~((~0UL) << extra_shift));
ret = ci_set_smc_sram_address(rdev, addr, limit);
if (ret)
goto done;
WREG32(SMC_IND_DATA_0, data);
}
done:
spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
return ret;
}
void ci_start_smc(struct radeon_device *rdev)
{
u32 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
tmp &= ~RST_REG;
WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
}
void ci_reset_smc(struct radeon_device *rdev)
{
u32 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
tmp |= RST_REG;
WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
}
int ci_program_jump_on_start(struct radeon_device *rdev)
{
static const u8 data[] = { 0xE0, 0x00, 0x80, 0x40 };
return ci_copy_bytes_to_smc(rdev, 0x0, data, 4, sizeof(data)+1);
}
void ci_stop_smc_clock(struct radeon_device *rdev)
{
u32 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
tmp |= CK_DISABLE;
WREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0, tmp);
}
void ci_start_smc_clock(struct radeon_device *rdev)
{
u32 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
tmp &= ~CK_DISABLE;
WREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0, tmp);
}
bool ci_is_smc_running(struct radeon_device *rdev)
{
u32 clk = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
u32 pc_c = RREG32_SMC(SMC_PC_C);
if (!(clk & CK_DISABLE) && (0x20100 <= pc_c))
return true;
return false;
}
#if 0
PPSMC_Result ci_wait_for_smc_inactive(struct radeon_device *rdev)
{
u32 tmp;
int i;
if (!ci_is_smc_running(rdev))
return PPSMC_Result_OK;
for (i = 0; i < rdev->usec_timeout; i++) {
tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
if ((tmp & CKEN) == 0)
break;
udelay(1);
}
return PPSMC_Result_OK;
}
#endif
int ci_load_smc_ucode(struct radeon_device *rdev, u32 limit)
{
unsigned long flags;
u32 ucode_start_address;
u32 ucode_size;
const u8 *src;
u32 data;
if (!rdev->smc_fw)
return -EINVAL;
if (rdev->new_fw) {
const struct smc_firmware_header_v1_0 *hdr =
(const struct smc_firmware_header_v1_0 *)rdev->smc_fw->data;
radeon_ucode_print_smc_hdr(&hdr->header);
ucode_start_address = le32_to_cpu(hdr->ucode_start_addr);
ucode_size = le32_to_cpu(hdr->header.ucode_size_bytes);
src = (const u8 *)
(rdev->smc_fw->data + le32_to_cpu(hdr->header.ucode_array_offset_bytes));
} else {
switch (rdev->family) {
case CHIP_BONAIRE:
ucode_start_address = BONAIRE_SMC_UCODE_START;
ucode_size = BONAIRE_SMC_UCODE_SIZE;
break;
case CHIP_HAWAII:
ucode_start_address = HAWAII_SMC_UCODE_START;
ucode_size = HAWAII_SMC_UCODE_SIZE;
break;
default:
DRM_ERROR("unknown asic in smc ucode loader\n");
BUG();
}
src = (const u8 *)rdev->smc_fw->data;
}
if (ucode_size & 3)
return -EINVAL;
spin_lock_irqsave(&rdev->smc_idx_lock, flags);
WREG32(SMC_IND_INDEX_0, ucode_start_address);
WREG32_P(SMC_IND_ACCESS_CNTL, AUTO_INCREMENT_IND_0, ~AUTO_INCREMENT_IND_0);
while (ucode_size >= 4) {
/* SMC address space is BE */
data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
WREG32(SMC_IND_DATA_0, data);
src += 4;
ucode_size -= 4;
}
WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
return 0;
}
int ci_read_smc_sram_dword(struct radeon_device *rdev,
u32 smc_address, u32 *value, u32 limit)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&rdev->smc_idx_lock, flags);
ret = ci_set_smc_sram_address(rdev, smc_address, limit);
if (ret == 0)
*value = RREG32(SMC_IND_DATA_0);
spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
return ret;
}
int ci_write_smc_sram_dword(struct radeon_device *rdev,
u32 smc_address, u32 value, u32 limit)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&rdev->smc_idx_lock, flags);
ret = ci_set_smc_sram_address(rdev, smc_address, limit);
if (ret == 0)
WREG32(SMC_IND_DATA_0, value);
spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
return ret;
}
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