blob: 1fcd3ba84cea11e65e61d2ece60d7ac0451be995 [file] [log] [blame]
/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <asm/page.h>
#include <asm/sizes.h>
#include <mach/iommu.h>
#include <mach/iommu_domains.h>
#include <mach/subsystem_restart.h>
#include <mach/msm_bus_board.h>
#include <mach/msm_bus.h>
#include "peripheral-loader.h"
#include "scm-pas.h"
#include "ramdump.h"
/* VENUS WRAPPER registers */
#define VENUS_WRAPPER_CLOCK_CONFIG 0x4
#define VENUS_WRAPPER_VBIF_SS_SEC_CPA_START_ADDR 0x1018
#define VENUS_WRAPPER_VBIF_SS_SEC_CPA_END_ADDR 0x101C
#define VENUS_WRAPPER_VBIF_SS_SEC_FW_START_ADDR 0x1020
#define VENUS_WRAPPER_VBIF_SS_SEC_FW_END_ADDR 0x1024
#define VENUS_WRAPPER_CPU_CLOCK_CONFIG 0x2000
#define VENUS_WRAPPER_SW_RESET 0x3000
/* VENUS VBIF registers */
#define VENUS_VBIF_AXI_HALT_CTRL0 0x0
#define VENUS_VBIF_AXI_HALT_CTRL0_HALT_REQ BIT(0)
#define VENUS_VBIF_AXI_HALT_CTRL1 0x4
#define VENUS_VBIF_AXI_HALT_CTRL1_HALT_ACK BIT(0)
#define VENUS_VBIF_AXI_HALT_ACK_TIMEOUT_US 500000
/* PIL proxy vote timeout */
#define VENUS_PROXY_TIMEOUT 10000
/* Poll interval in uS */
#define POLL_INTERVAL_US 50
static const char * const clk_names[] = {
"core_clk",
"iface_clk",
"bus_clk",
"mem_clk",
};
struct venus_data {
void __iomem *venus_wrapper_base;
void __iomem *venus_vbif_base;
struct pil_desc desc;
struct subsys_device *subsys;
struct subsys_desc subsys_desc;
struct regulator *gdsc;
struct clk *clks[ARRAY_SIZE(clk_names)];
struct device *iommu_fw_ctx;
struct iommu_domain *iommu_fw_domain;
int venus_domain_num;
bool is_booted;
void *ramdump_dev;
u32 fw_sz;
u32 fw_min_paddr;
u32 fw_max_paddr;
u32 bus_perf_client;
};
#define subsys_to_drv(d) container_of(d, struct venus_data, subsys_desc)
static int venus_register_domain(u32 fw_max_sz)
{
struct msm_iova_partition venus_fw_partition = {
.start = 0,
.size = fw_max_sz,
};
struct msm_iova_layout venus_fw_layout = {
.partitions = &venus_fw_partition,
.npartitions = 1,
.client_name = "pil_venus",
.domain_flags = 0,
};
return msm_register_domain(&venus_fw_layout);
}
/* Get venus clocks and set rates for rate-settable clocks */
static int venus_clock_setup(struct device *dev)
{
struct venus_data *drv = dev_get_drvdata(dev);
int i;
for (i = 0; i < ARRAY_SIZE(drv->clks); i++) {
drv->clks[i] = devm_clk_get(dev, clk_names[i]);
if (IS_ERR(drv->clks[i])) {
dev_err(dev, "failed to get %s\n",
clk_names[i]);
return PTR_ERR(drv->clks[i]);
}
/* Make sure rate-settable clocks' rates are set */
if (clk_get_rate(drv->clks[i]) == 0)
clk_set_rate(drv->clks[i],
clk_round_rate(drv->clks[i], 0));
}
return 0;
}
static int venus_clock_prepare_enable(struct device *dev)
{
struct venus_data *drv = dev_get_drvdata(dev);
int rc, i;
for (i = 0; i < ARRAY_SIZE(drv->clks); i++) {
rc = clk_prepare_enable(drv->clks[i]);
if (rc) {
dev_err(dev, "failed to enable %s\n",
clk_names[i]);
for (i--; i >= 0; i--)
clk_disable_unprepare(drv->clks[i]);
return rc;
}
}
return 0;
}
static void venus_clock_disable_unprepare(struct device *dev)
{
struct venus_data *drv = dev_get_drvdata(dev);
int i;
for (i = 0; i < ARRAY_SIZE(drv->clks); i++)
clk_disable_unprepare(drv->clks[i]);
}
static struct msm_bus_vectors pil_venus_unvote_bw_vector[] = {
{
.src = MSM_BUS_MASTER_VIDEO_P0,
.dst = MSM_BUS_SLAVE_EBI_CH0,
.ab = 0,
.ib = 0,
},
};
static struct msm_bus_vectors pil_venus_vote_bw_vector[] = {
{
.src = MSM_BUS_MASTER_VIDEO_P0,
.dst = MSM_BUS_SLAVE_EBI_CH0,
.ab = 0,
.ib = 16 * 19 * 1000000UL, /* At least 19.2MHz on bus. */
},
};
static struct msm_bus_paths pil_venus_bw_tbl[] = {
{
.num_paths = ARRAY_SIZE(pil_venus_unvote_bw_vector),
.vectors = pil_venus_unvote_bw_vector,
},
{
.num_paths = ARRAY_SIZE(pil_venus_vote_bw_vector),
.vectors = pil_venus_vote_bw_vector,
},
};
static struct msm_bus_scale_pdata pil_venus_client_pdata = {
.usecase = pil_venus_bw_tbl,
.num_usecases = ARRAY_SIZE(pil_venus_bw_tbl),
.name = "pil-venus",
};
static int pil_venus_make_proxy_vote(struct pil_desc *pil)
{
struct venus_data *drv = dev_get_drvdata(pil->dev);
int rc;
/*
* Clocks need to be proxy voted to be able to pass control
* of clocks from PIL driver to the Venus driver. But GDSC
* needs to be turned on before clocks can be turned on. So
* enable the GDSC here.
*/
rc = regulator_enable(drv->gdsc);
if (rc) {
dev_err(pil->dev, "GDSC enable failed\n");
goto err_regulator;
}
rc = venus_clock_prepare_enable(pil->dev);
if (rc) {
dev_err(pil->dev, "clock prepare and enable failed\n");
goto err_clock;
}
rc = msm_bus_scale_client_update_request(drv->bus_perf_client, 1);
if (rc) {
dev_err(pil->dev, "bandwith request failed\n");
goto err_bw;
}
return 0;
err_bw:
venus_clock_disable_unprepare(pil->dev);
err_clock:
regulator_disable(drv->gdsc);
err_regulator:
return rc;
}
static void pil_venus_remove_proxy_vote(struct pil_desc *pil)
{
struct venus_data *drv = dev_get_drvdata(pil->dev);
msm_bus_scale_client_update_request(drv->bus_perf_client, 0);
venus_clock_disable_unprepare(pil->dev);
/* Disable GDSC */
regulator_disable(drv->gdsc);
}
static int pil_venus_mem_setup(struct pil_desc *pil, phys_addr_t addr,
size_t size)
{
int domain;
struct venus_data *drv = dev_get_drvdata(pil->dev);
/* TODO: unregister? */
if (!drv->venus_domain_num) {
size = round_up(size, SZ_4K);
domain = venus_register_domain(size);
if (domain < 0) {
dev_err(pil->dev, "Venus fw iommu domain register failed\n");
return -ENODEV;
}
drv->iommu_fw_domain = msm_get_iommu_domain(domain);
if (!drv->iommu_fw_domain) {
dev_err(pil->dev, "No iommu fw domain found\n");
return -ENODEV;
}
drv->venus_domain_num = domain;
drv->fw_sz = size;
}
return 0;
}
static int pil_venus_reset(struct pil_desc *pil)
{
int rc;
struct venus_data *drv = dev_get_drvdata(pil->dev);
void __iomem *wrapper_base = drv->venus_wrapper_base;
phys_addr_t pa = pil_get_entry_addr(pil);
unsigned long iova;
/*
* GDSC needs to remain on till Venus is shutdown. So, enable
* the GDSC here again to make sure it remains on beyond the
* expiry of the proxy vote timer.
*/
rc = regulator_enable(drv->gdsc);
if (rc) {
dev_err(pil->dev, "GDSC enable failed\n");
return rc;
}
/* Program CPA start and end address */
writel_relaxed(0, wrapper_base +
VENUS_WRAPPER_VBIF_SS_SEC_CPA_START_ADDR);
writel_relaxed(drv->fw_sz, wrapper_base +
VENUS_WRAPPER_VBIF_SS_SEC_CPA_END_ADDR);
/* Program FW start and end address */
writel_relaxed(0, wrapper_base +
VENUS_WRAPPER_VBIF_SS_SEC_FW_START_ADDR);
writel_relaxed(drv->fw_sz, wrapper_base +
VENUS_WRAPPER_VBIF_SS_SEC_FW_END_ADDR);
/* Enable all Venus internal clocks */
writel_relaxed(0, wrapper_base + VENUS_WRAPPER_CLOCK_CONFIG);
writel_relaxed(0, wrapper_base + VENUS_WRAPPER_CPU_CLOCK_CONFIG);
/* Make sure clocks are enabled */
mb();
/*
* Need to wait 10 cycles of internal clocks before bringing ARM9
* out of reset.
*/
udelay(1);
rc = iommu_attach_device(drv->iommu_fw_domain, drv->iommu_fw_ctx);
if (rc) {
dev_err(pil->dev, "venus fw iommu attach failed\n");
goto err_iommu_attach;
}
/* Map virtual addr space 0 - fw_sz to firmware physical addr space */
rc = msm_iommu_map_contig_buffer(pa, drv->venus_domain_num, 0,
drv->fw_sz, SZ_4K, 0, &iova);
if (rc || (iova != 0)) {
dev_err(pil->dev, "Failed to setup IOMMU\n");
goto err_iommu_map;
}
/* Bring Arm9 out of reset */
writel_relaxed(0, wrapper_base + VENUS_WRAPPER_SW_RESET);
drv->is_booted = 1;
return 0;
err_iommu_map:
iommu_detach_device(drv->iommu_fw_domain, drv->iommu_fw_ctx);
err_iommu_attach:
regulator_disable(drv->gdsc);
return rc;
}
static int pil_venus_shutdown(struct pil_desc *pil)
{
struct venus_data *drv = dev_get_drvdata(pil->dev);
void __iomem *vbif_base = drv->venus_vbif_base;
void __iomem *wrapper_base = drv->venus_wrapper_base;
u32 reg;
int rc;
if (!drv->is_booted)
return 0;
venus_clock_prepare_enable(pil->dev);
/* Assert the reset to ARM9 */
reg = readl_relaxed(wrapper_base + VENUS_WRAPPER_SW_RESET);
reg |= BIT(4);
writel_relaxed(reg, wrapper_base + VENUS_WRAPPER_SW_RESET);
/* Make sure reset is asserted before the mapping is removed */
mb();
msm_iommu_unmap_contig_buffer(0, drv->venus_domain_num,
0, drv->fw_sz);
iommu_detach_device(drv->iommu_fw_domain, drv->iommu_fw_ctx);
/* Halt AXI and AXI OCMEM VBIF Access */
reg = readl_relaxed(vbif_base + VENUS_VBIF_AXI_HALT_CTRL0);
reg |= VENUS_VBIF_AXI_HALT_CTRL0_HALT_REQ;
writel_relaxed(reg, vbif_base + VENUS_VBIF_AXI_HALT_CTRL0);
/* Request for AXI bus port halt */
rc = readl_poll_timeout(vbif_base + VENUS_VBIF_AXI_HALT_CTRL1,
reg, reg & VENUS_VBIF_AXI_HALT_CTRL1_HALT_ACK,
POLL_INTERVAL_US,
VENUS_VBIF_AXI_HALT_ACK_TIMEOUT_US);
if (rc)
dev_err(pil->dev, "Port halt timeout\n");
venus_clock_disable_unprepare(pil->dev);
regulator_disable(drv->gdsc);
drv->is_booted = 0;
return 0;
}
static struct pil_reset_ops pil_venus_ops = {
.mem_setup = pil_venus_mem_setup,
.auth_and_reset = pil_venus_reset,
.shutdown = pil_venus_shutdown,
.proxy_vote = pil_venus_make_proxy_vote,
.proxy_unvote = pil_venus_remove_proxy_vote,
};
static int pil_venus_init_image_trusted(struct pil_desc *pil,
const u8 *metadata, size_t size)
{
return pas_init_image(PAS_VIDC, metadata, size);
}
static int pil_venus_mem_setup_trusted(struct pil_desc *pil, phys_addr_t addr,
size_t size)
{
return pas_mem_setup(PAS_VIDC, addr, size);
}
static int pil_venus_reset_trusted(struct pil_desc *pil)
{
int rc;
struct venus_data *drv = dev_get_drvdata(pil->dev);
/*
* GDSC needs to remain on till Venus is shutdown. So, enable
* the GDSC here again to make sure it remains on beyond the
* expiry of the proxy vote timer.
*/
rc = regulator_enable(drv->gdsc);
if (rc) {
dev_err(pil->dev, "GDSC enable failed\n");
return rc;
}
rc = pas_auth_and_reset(PAS_VIDC);
if (rc)
regulator_disable(drv->gdsc);
return rc;
}
static int pil_venus_shutdown_trusted(struct pil_desc *pil)
{
int rc;
struct venus_data *drv = dev_get_drvdata(pil->dev);
venus_clock_prepare_enable(pil->dev);
rc = pas_shutdown(PAS_VIDC);
venus_clock_disable_unprepare(pil->dev);
regulator_disable(drv->gdsc);
return rc;
}
static struct pil_reset_ops pil_venus_ops_trusted = {
.init_image = pil_venus_init_image_trusted,
.mem_setup = pil_venus_mem_setup_trusted,
.auth_and_reset = pil_venus_reset_trusted,
.shutdown = pil_venus_shutdown_trusted,
.proxy_vote = pil_venus_make_proxy_vote,
.proxy_unvote = pil_venus_remove_proxy_vote,
};
static int venus_start(const struct subsys_desc *desc)
{
struct venus_data *drv = subsys_to_drv(desc);
return pil_boot(&drv->desc);
}
static void venus_stop(const struct subsys_desc *desc)
{
struct venus_data *drv = subsys_to_drv(desc);
pil_shutdown(&drv->desc);
}
static int venus_shutdown(const struct subsys_desc *desc)
{
struct venus_data *drv = subsys_to_drv(desc);
pil_shutdown(&drv->desc);
return 0;
}
static int venus_powerup(const struct subsys_desc *desc)
{
struct venus_data *drv = subsys_to_drv(desc);
return pil_boot(&drv->desc);
}
static int venus_ramdump(int enable, const struct subsys_desc *desc)
{
struct venus_data *drv = subsys_to_drv(desc);
if (!enable)
return 0;
return pil_do_ramdump(&drv->desc, drv->ramdump_dev);
}
static int __devinit pil_venus_probe(struct platform_device *pdev)
{
struct venus_data *drv;
struct resource *res;
struct pil_desc *desc;
int rc;
drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
if (!drv)
return -ENOMEM;
platform_set_drvdata(pdev, drv);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"wrapper_base");
drv->venus_wrapper_base = devm_request_and_ioremap(&pdev->dev, res);
if (!drv->venus_wrapper_base)
return -ENOMEM;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vbif_base");
drv->venus_vbif_base = devm_request_and_ioremap(&pdev->dev, res);
if (!drv->venus_vbif_base)
return -ENOMEM;
drv->gdsc = devm_regulator_get(&pdev->dev, "vdd");
if (IS_ERR(drv->gdsc)) {
dev_err(&pdev->dev, "Failed to get Venus GDSC\n");
return -ENODEV;
}
rc = venus_clock_setup(&pdev->dev);
if (rc)
return rc;
drv->bus_perf_client =
msm_bus_scale_register_client(&pil_venus_client_pdata);
if (!drv->bus_perf_client) {
dev_err(&pdev->dev, "Failed to register bus client\n");
return -EINVAL;
}
drv->iommu_fw_ctx = msm_iommu_get_ctx("venus_fw");
if (!drv->iommu_fw_ctx) {
dev_err(&pdev->dev, "No iommu fw context found\n");
return -ENODEV;
}
desc = &drv->desc;
rc = of_property_read_string(pdev->dev.of_node, "qcom,firmware-name",
&desc->name);
if (rc)
return rc;
desc->dev = &pdev->dev;
desc->owner = THIS_MODULE;
desc->proxy_timeout = VENUS_PROXY_TIMEOUT;
if (pas_supported(PAS_VIDC) > 0) {
desc->ops = &pil_venus_ops_trusted;
dev_info(&pdev->dev, "using secure boot\n");
} else {
desc->ops = &pil_venus_ops;
dev_info(&pdev->dev, "using non-secure boot\n");
}
drv->ramdump_dev = create_ramdump_device("venus", &pdev->dev);
if (!drv->ramdump_dev)
return -ENOMEM;
rc = pil_desc_init(desc);
if (rc)
goto err_ramdump;
drv->subsys_desc.name = desc->name;
drv->subsys_desc.owner = THIS_MODULE;
drv->subsys_desc.dev = &pdev->dev;
drv->subsys_desc.start = venus_start;
drv->subsys_desc.stop = venus_stop;
drv->subsys_desc.shutdown = venus_shutdown;
drv->subsys_desc.powerup = venus_powerup;
drv->subsys_desc.ramdump = venus_ramdump;
drv->subsys = subsys_register(&drv->subsys_desc);
if (IS_ERR(drv->subsys)) {
rc = PTR_ERR(drv->subsys);
goto err_subsys;
}
return rc;
err_subsys:
pil_desc_release(desc);
err_ramdump:
destroy_ramdump_device(drv->ramdump_dev);
return rc;
}
static int __devexit pil_venus_remove(struct platform_device *pdev)
{
struct venus_data *drv = platform_get_drvdata(pdev);
subsys_unregister(drv->subsys);
pil_desc_release(&drv->desc);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id msm_pil_venus_match[] = {
{.compatible = "qcom,pil-venus"},
{}
};
#endif
static struct platform_driver pil_venus_driver = {
.probe = pil_venus_probe,
.remove = __devexit_p(pil_venus_remove),
.driver = {
.name = "pil_venus",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(msm_pil_venus_match),
},
};
module_platform_driver(pil_venus_driver);
MODULE_DESCRIPTION("Support for booting VENUS processors");
MODULE_LICENSE("GPL v2");