diff options
| author | Jaehoon Chung <jh80.chung@samsung.com> | 2015-05-08 10:02:12 +0900 |
|---|---|---|
| committer | Seung-Woo Kim <sw0312.kim@samsung.com> | 2016-12-14 13:44:52 +0900 |
| commit | 758a071d8caeb3804ecdd3408df216dc3c63f8a7 (patch) | |
| tree | 860566fedab9b4218852bd95db70971187fb8ff7 /drivers/pci | |
| parent | ba9778fa247086dce32521e9b7fc3e0809de3bce (diff) | |
local/pci: pci-exynos5433: add vendor message request into suspend_noirq
This patch referred to android code.
It seems to request the vendor message before suspend.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pci-exynos5433.c | 47 |
1 files changed, 45 insertions, 2 deletions
diff --git a/drivers/pci/host/pci-exynos5433.c b/drivers/pci/host/pci-exynos5433.c index 762c6eb2d2f2..22ff1370295a 100644 --- a/drivers/pci/host/pci-exynos5433.c +++ b/drivers/pci/host/pci-exynos5433.c @@ -82,6 +82,12 @@ struct exynos_pcie { #define PCIE_AUX_PM_EN 0x0A4 #define AUX_PM_DISABLE 0x0 #define AUX_PM_ENABLE 0x1 +#define PCIE_VEN_MSG_REQ 0x0A8 +#define VEN_MSG_REQ_DISABLE 0x0 +#define VEN_MSG_REQ_ENABLE 0x1 +#define PCIE_VEN_MSG_FMT 0x0AC +#define PCIE_VEN_MSG_TYPE 0x0B0 +#define PCIE_VEN_MSG_CODE 0x0D0 #define PCIE_ELBI_SLV_AWMISC 0x11c #define PCIE_ELBI_SLV_ARMISC 0x120 #define PCIE_ELBI_SLV_DBI_ENABLE BIT(21) @@ -615,10 +621,47 @@ static int exynos_pcie_remove(struct platform_device *pdev) static int exynos_pcie_suspend_noirq(struct device *dev) { struct exynos_pcie *ep = dev_get_drvdata(dev); + u32 val, count = 0; if (ep->wlanen_gpio && !gpio_get_value(ep->wlanen_gpio)) return 0; + exynos_pcie_writel(ep->elbi_base, VEN_MSG_REQ_DISABLE, + PCIE_VEN_MSG_REQ); + + val = exynos_pcie_readl(ep->block_base, PCIE_PHY_GLOBAL_RESET); + val |= PCIE_APP_REQ_EXIT_L1_MODE; + exynos_pcie_writel(ep->block_base, val, PCIE_PHY_GLOBAL_RESET); + + exynos_pcie_writel(ep->elbi_base, 0x1, PCIE_APP_REQ_EXIT_L1); + exynos_pcie_writel(ep->elbi_base, 0x1, PCIE_VEN_MSG_FMT); + exynos_pcie_writel(ep->elbi_base, 0x13, PCIE_VEN_MSG_TYPE); + exynos_pcie_writel(ep->elbi_base, 0x19, PCIE_VEN_MSG_CODE); + exynos_pcie_writel(ep->elbi_base, VEN_MSG_REQ_ENABLE, + PCIE_VEN_MSG_REQ); + + while (count < 1000) { + if (exynos_pcie_readl(ep->elbi_base, PCIE_IRQ_PULSE) & IRQ_RADM_PM_TO_ACK) { + printk("ack message is ok\n"); + break; + } + udelay(10); + count++; + } + exynos_pcie_writel(ep->elbi_base, 0x0, PCIE_APP_REQ_EXIT_L1); + + count = 0; + do { + val = exynos_pcie_readl(ep->elbi_base, PCIE_ELBI_RDLH_LINKUP); + val = val & 0x1f; + if (val == 0x15) { + printk("Recevied enter_l23 LLLP packet\n"); + break; + } + udelay(10); + count++; + } while (count < 1000); + return 0; } @@ -674,8 +717,8 @@ static int exynos_pcie_resume_noirq(struct device *dev) #endif /* CONFIG_PM */ static const struct dev_pm_ops exynos_pcie_pm_ops = { - .suspend_noirq = exynos_pcie_suspend_noirq, - .resume_noirq = exynos_pcie_resume_noirq, + .suspend_noirq = exynos_pcie_suspend_noirq, + .resume_noirq = exynos_pcie_resume_noirq, }; static const struct of_device_id exynos_pcie_of_match[] = { |