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/*
* Copyright 2015 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: AMD
*
*/
#include <linux/irqdomain.h>
#include <linux/pm_domain.h>
#include <linux/platform_device.h>
#include <sound/designware_i2s.h>
#include <sound/pcm.h>
#include "amdgpu.h"
#include "atom.h"
#include "amdgpu_acp.h"
#include "acp_gfx_if.h"
#define ACP_TILE_ON_MASK 0x03
#define ACP_TILE_OFF_MASK 0x02
#define ACP_TILE_ON_RETAIN_REG_MASK 0x1f
#define ACP_TILE_OFF_RETAIN_REG_MASK 0x20
#define ACP_TILE_P1_MASK 0x3e
#define ACP_TILE_P2_MASK 0x3d
#define ACP_TILE_DSP0_MASK 0x3b
#define ACP_TILE_DSP1_MASK 0x37
#define ACP_TILE_DSP2_MASK 0x2f
#define ACP_DMA_REGS_END 0x146c0
#define ACP_I2S_PLAY_REGS_START 0x14840
#define ACP_I2S_PLAY_REGS_END 0x148b4
#define ACP_I2S_CAP_REGS_START 0x148b8
#define ACP_I2S_CAP_REGS_END 0x1496c
#define ACP_I2S_COMP1_CAP_REG_OFFSET 0xac
#define ACP_I2S_COMP2_CAP_REG_OFFSET 0xa8
#define ACP_I2S_COMP1_PLAY_REG_OFFSET 0x6c
#define ACP_I2S_COMP2_PLAY_REG_OFFSET 0x68
#define mmACP_PGFSM_RETAIN_REG 0x51c9
#define mmACP_PGFSM_CONFIG_REG 0x51ca
#define mmACP_PGFSM_READ_REG_0 0x51cc
#define mmACP_MEM_SHUT_DOWN_REQ_LO 0x51f8
#define mmACP_MEM_SHUT_DOWN_REQ_HI 0x51f9
#define mmACP_MEM_SHUT_DOWN_STS_LO 0x51fa
#define mmACP_MEM_SHUT_DOWN_STS_HI 0x51fb
#define ACP_TIMEOUT_LOOP 0x000000FF
#define ACP_DEVS 3
#define ACP_SRC_ID 162
enum {
ACP_TILE_P1 = 0,
ACP_TILE_P2,
ACP_TILE_DSP0,
ACP_TILE_DSP1,
ACP_TILE_DSP2,
};
static int acp_sw_init(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
adev->acp.parent = adev->dev;
adev->acp.cgs_device =
amdgpu_cgs_create_device(adev);
if (!adev->acp.cgs_device)
return -EINVAL;
return 0;
}
static int acp_sw_fini(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
if (adev->acp.cgs_device)
amdgpu_cgs_destroy_device(adev->acp.cgs_device);
return 0;
}
/* power off a tile/block within ACP */
static int acp_suspend_tile(void *cgs_dev, int tile)
{
u32 val = 0;
u32 count = 0;
if ((tile < ACP_TILE_P1) || (tile > ACP_TILE_DSP2)) {
pr_err("Invalid ACP tile : %d to suspend\n", tile);
return -1;
}
val = cgs_read_register(cgs_dev, mmACP_PGFSM_READ_REG_0 + tile);
val &= ACP_TILE_ON_MASK;
if (val == 0x0) {
val = cgs_read_register(cgs_dev, mmACP_PGFSM_RETAIN_REG);
val = val | (1 << tile);
cgs_write_register(cgs_dev, mmACP_PGFSM_RETAIN_REG, val);
cgs_write_register(cgs_dev, mmACP_PGFSM_CONFIG_REG,
0x500 + tile);
count = ACP_TIMEOUT_LOOP;
while (true) {
val = cgs_read_register(cgs_dev, mmACP_PGFSM_READ_REG_0
+ tile);
val = val & ACP_TILE_ON_MASK;
if (val == ACP_TILE_OFF_MASK)
break;
if (--count == 0) {
pr_err("Timeout reading ACP PGFSM status\n");
return -ETIMEDOUT;
}
udelay(100);
}
val = cgs_read_register(cgs_dev, mmACP_PGFSM_RETAIN_REG);
val |= ACP_TILE_OFF_RETAIN_REG_MASK;
cgs_write_register(cgs_dev, mmACP_PGFSM_RETAIN_REG, val);
}
return 0;
}
/* power on a tile/block within ACP */
static int acp_resume_tile(void *cgs_dev, int tile)
{
u32 val = 0;
u32 count = 0;
if ((tile < ACP_TILE_P1) || (tile > ACP_TILE_DSP2)) {
pr_err("Invalid ACP tile to resume\n");
return -1;
}
val = cgs_read_register(cgs_dev, mmACP_PGFSM_READ_REG_0 + tile);
val = val & ACP_TILE_ON_MASK;
if (val != 0x0) {
cgs_write_register(cgs_dev, mmACP_PGFSM_CONFIG_REG,
0x600 + tile);
count = ACP_TIMEOUT_LOOP;
while (true) {
val = cgs_read_register(cgs_dev, mmACP_PGFSM_READ_REG_0
+ tile);
val = val & ACP_TILE_ON_MASK;
if (val == 0x0)
break;
if (--count == 0) {
pr_err("Timeout reading ACP PGFSM status\n");
return -ETIMEDOUT;
}
udelay(100);
}
val = cgs_read_register(cgs_dev, mmACP_PGFSM_RETAIN_REG);
if (tile == ACP_TILE_P1)
val = val & (ACP_TILE_P1_MASK);
else if (tile == ACP_TILE_P2)
val = val & (ACP_TILE_P2_MASK);
cgs_write_register(cgs_dev, mmACP_PGFSM_RETAIN_REG, val);
}
return 0;
}
struct acp_pm_domain {
void *cgs_dev;
struct generic_pm_domain gpd;
};
static int acp_poweroff(struct generic_pm_domain *genpd)
{
int i, ret;
struct acp_pm_domain *apd;
apd = container_of(genpd, struct acp_pm_domain, gpd);
if (apd != NULL) {
/* Donot return abruptly if any of power tile fails to suspend.
* Log it and continue powering off other tile
*/
for (i = 4; i >= 0 ; i--) {
ret = acp_suspend_tile(apd->cgs_dev, ACP_TILE_P1 + i);
if (ret)
pr_err("ACP tile %d tile suspend failed\n", i);
}
}
return 0;
}
static int acp_poweron(struct generic_pm_domain *genpd)
{
int i, ret;
struct acp_pm_domain *apd;
apd = container_of(genpd, struct acp_pm_domain, gpd);
if (apd != NULL) {
for (i = 0; i < 2; i++) {
ret = acp_resume_tile(apd->cgs_dev, ACP_TILE_P1 + i);
if (ret) {
pr_err("ACP tile %d resume failed\n", i);
break;
}
}
/* Disable DSPs which are not going to be used */
for (i = 0; i < 3; i++) {
ret = acp_suspend_tile(apd->cgs_dev, ACP_TILE_DSP0 + i);
/* Continue suspending other DSP, even if one fails */
if (ret)
pr_err("ACP DSP %d suspend failed\n", i);
}
}
return 0;
}
static struct device *get_mfd_cell_dev(const char *device_name, int r)
{
char auto_dev_name[25];
struct device *dev;
snprintf(auto_dev_name, sizeof(auto_dev_name),
"%s.%d.auto", device_name, r);
dev = bus_find_device_by_name(&platform_bus_type, NULL, auto_dev_name);
dev_info(dev, "device %s added to pm domain\n", auto_dev_name);
return dev;
}
/**
* acp_hw_init - start and test ACP block
*
* @adev: amdgpu_device pointer
*
*/
static int acp_hw_init(void *handle)
{
int r, i;
uint64_t acp_base;
struct device *dev;
struct i2s_platform_data *i2s_pdata;
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
const struct amdgpu_ip_block_version *ip_version =
amdgpu_get_ip_block(adev, AMD_IP_BLOCK_TYPE_ACP);
if (!ip_version)
return -EINVAL;
r = amd_acp_hw_init(adev->acp.cgs_device,
ip_version->major, ip_version->minor);
/* -ENODEV means board uses AZ rather than ACP */
if (r == -ENODEV)
return 0;
else if (r)
return r;
r = cgs_get_pci_resource(adev->acp.cgs_device, CGS_RESOURCE_TYPE_MMIO,
0x5289, 0, &acp_base);
if (r == -ENODEV)
return 0;
else if (r)
return r;
adev->acp.acp_genpd = kzalloc(sizeof(struct acp_pm_domain), GFP_KERNEL);
if (adev->acp.acp_genpd == NULL)
return -ENOMEM;
adev->acp.acp_genpd->gpd.name = "ACP_AUDIO";
adev->acp.acp_genpd->gpd.power_off = acp_poweroff;
adev->acp.acp_genpd->gpd.power_on = acp_poweron;
adev->acp.acp_genpd->cgs_dev = adev->acp.cgs_device;
pm_genpd_init(&adev->acp.acp_genpd->gpd, NULL, false);
adev->acp.acp_cell = kzalloc(sizeof(struct mfd_cell) * ACP_DEVS,
GFP_KERNEL);
if (adev->acp.acp_cell == NULL)
return -ENOMEM;
adev->acp.acp_res = kzalloc(sizeof(struct resource) * 4, GFP_KERNEL);
if (adev->acp.acp_res == NULL) {
kfree(adev->acp.acp_cell);
return -ENOMEM;
}
i2s_pdata = kzalloc(sizeof(struct i2s_platform_data) * 2, GFP_KERNEL);
if (i2s_pdata == NULL) {
kfree(adev->acp.acp_res);
kfree(adev->acp.acp_cell);
return -ENOMEM;
}
i2s_pdata[0].quirks = DW_I2S_QUIRK_COMP_REG_OFFSET;
i2s_pdata[0].cap = DWC_I2S_PLAY;
i2s_pdata[0].snd_rates = SNDRV_PCM_RATE_8000_96000;
i2s_pdata[0].i2s_reg_comp1 = ACP_I2S_COMP1_PLAY_REG_OFFSET;
i2s_pdata[0].i2s_reg_comp2 = ACP_I2S_COMP2_PLAY_REG_OFFSET;
i2s_pdata[1].quirks = DW_I2S_QUIRK_COMP_REG_OFFSET |
DW_I2S_QUIRK_COMP_PARAM1;
i2s_pdata[1].cap = DWC_I2S_RECORD;
i2s_pdata[1].snd_rates = SNDRV_PCM_RATE_8000_96000;
i2s_pdata[1].i2s_reg_comp1 = ACP_I2S_COMP1_CAP_REG_OFFSET;
i2s_pdata[1].i2s_reg_comp2 = ACP_I2S_COMP2_CAP_REG_OFFSET;
adev->acp.acp_res[0].name = "acp2x_dma";
adev->acp.acp_res[0].flags = IORESOURCE_MEM;
adev->acp.acp_res[0].start = acp_base;
adev->acp.acp_res[0].end = acp_base + ACP_DMA_REGS_END;
adev->acp.acp_res[1].name = "acp2x_dw_i2s_play";
adev->acp.acp_res[1].flags = IORESOURCE_MEM;
adev->acp.acp_res[1].start = acp_base + ACP_I2S_PLAY_REGS_START;
adev->acp.acp_res[1].end = acp_base + ACP_I2S_PLAY_REGS_END;
adev->acp.acp_res[2].name = "acp2x_dw_i2s_cap";
adev->acp.acp_res[2].flags = IORESOURCE_MEM;
adev->acp.acp_res[2].start = acp_base + ACP_I2S_CAP_REGS_START;
adev->acp.acp_res[2].end = acp_base + ACP_I2S_CAP_REGS_END;
adev->acp.acp_res[3].name = "acp2x_dma_irq";
adev->acp.acp_res[3].flags = IORESOURCE_IRQ;
adev->acp.acp_res[3].start = amdgpu_irq_create_mapping(adev, 162);
adev->acp.acp_res[3].end = adev->acp.acp_res[3].start;
adev->acp.acp_cell[0].name = "acp_audio_dma";
adev->acp.acp_cell[0].num_resources = 4;
adev->acp.acp_cell[0].resources = &adev->acp.acp_res[0];
adev->acp.acp_cell[1].name = "designware-i2s";
adev->acp.acp_cell[1].num_resources = 1;
adev->acp.acp_cell[1].resources = &adev->acp.acp_res[1];
adev->acp.acp_cell[1].platform_data = &i2s_pdata[0];
adev->acp.acp_cell[1].pdata_size = sizeof(struct i2s_platform_data);
adev->acp.acp_cell[2].name = "designware-i2s";
adev->acp.acp_cell[2].num_resources = 1;
adev->acp.acp_cell[2].resources = &adev->acp.acp_res[2];
adev->acp.acp_cell[2].platform_data = &i2s_pdata[1];
adev->acp.acp_cell[2].pdata_size = sizeof(struct i2s_platform_data);
r = mfd_add_hotplug_devices(adev->acp.parent, adev->acp.acp_cell,
ACP_DEVS);
if (r)
return r;
for (i = 0; i < ACP_DEVS ; i++) {
dev = get_mfd_cell_dev(adev->acp.acp_cell[i].name, i);
r = pm_genpd_add_device(&adev->acp.acp_genpd->gpd, dev);
if (r) {
dev_err(dev, "Failed to add dev to genpd\n");
return r;
}
}
return 0;
}
/**
* acp_hw_fini - stop the hardware block
*
* @adev: amdgpu_device pointer
*
*/
static int acp_hw_fini(void *handle)
{
int i, ret;
struct device *dev;
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
for (i = 0; i < ACP_DEVS ; i++) {
dev = get_mfd_cell_dev(adev->acp.acp_cell[i].name, i);
ret = pm_genpd_remove_device(&adev->acp.acp_genpd->gpd, dev);
/* If removal fails, dont giveup and try rest */
if (ret)
dev_err(dev, "remove dev from genpd failed\n");
}
mfd_remove_devices(adev->acp.parent);
kfree(adev->acp.acp_res);
kfree(adev->acp.acp_genpd);
kfree(adev->acp.acp_cell);
return 0;
}
static int acp_suspend(void *handle)
{
return 0;
}
static int acp_resume(void *handle)
{
int i, ret;
struct acp_pm_domain *apd;
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
/* SMU block will power on ACP irrespective of ACP runtime status.
* Power off explicitly based on genpd ACP runtime status so that ACP
* hw and ACP-genpd status are in sync.
* 'suspend_power_off' represents "Power status before system suspend"
*/
if (adev->acp.acp_genpd->gpd.suspend_power_off == true) {
apd = container_of(&adev->acp.acp_genpd->gpd,
struct acp_pm_domain, gpd);
for (i = 4; i >= 0 ; i--) {
ret = acp_suspend_tile(apd->cgs_dev, ACP_TILE_P1 + i);
if (ret)
pr_err("ACP tile %d tile suspend failed\n", i);
}
}
return 0;
}
static int acp_early_init(void *handle)
{
return 0;
}
static bool acp_is_idle(void *handle)
{
return true;
}
static int acp_wait_for_idle(void *handle)
{
return 0;
}
static int acp_soft_reset(void *handle)
{
return 0;
}
static void acp_print_status(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
dev_info(adev->dev, "ACP STATUS\n");
}
static int acp_set_clockgating_state(void *handle,
enum amd_clockgating_state state)
{
return 0;
}
static int acp_set_powergating_state(void *handle,
enum amd_powergating_state state)
{
return 0;
}
const struct amd_ip_funcs acp_ip_funcs = {
.early_init = acp_early_init,
.late_init = NULL,
.sw_init = acp_sw_init,
.sw_fini = acp_sw_fini,
.hw_init = acp_hw_init,
.hw_fini = acp_hw_fini,
.suspend = acp_suspend,
.resume = acp_resume,
.is_idle = acp_is_idle,
.wait_for_idle = acp_wait_for_idle,
.soft_reset = acp_soft_reset,
.print_status = acp_print_status,
.set_clockgating_state = acp_set_clockgating_state,
.set_powergating_state = acp_set_powergating_state,
};
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