static int exynos_pcie_establish_link(struct pcie_port *pp)
{
u32 val;
int count = 0;
struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "Link already up\n");
return 0;
}
/* assert reset signals */
exynos_pcie_assert_core_reset(pp);
exynos_pcie_assert_phy_reset(pp);
/* de-assert phy reset */
exynos_pcie_deassert_phy_reset(pp);
/* initialize phy */
exynos_pcie_init_phy(pp);
/* pulse for common reset */
exynos_blk_writel(exynos_pcie, 1, PCIE_PHY_COMMON_RESET);
udelay(500);
exynos_blk_writel(exynos_pcie, 0, PCIE_PHY_COMMON_RESET);
/* de-assert core reset */
exynos_pcie_deassert_core_reset(pp);
/* setup root complex */
dw_pcie_setup_rc(pp);
/* assert reset signal */
exynos_pcie_assert_reset(pp);
/* assert LTSSM enable */
exynos_elb_writel(exynos_pcie, PCIE_ELBI_LTSSM_ENABLE,
PCIE_APP_LTSSM_ENABLE);
/* check if the link is up or not */
while (!dw_pcie_link_up(pp)) {
mdelay(100);
count++;
if (count == 10) {
while (exynos_phy_readl(exynos_pcie,
PCIE_PHY_PLL_LOCKED) == 0) {
val = exynos_blk_readl(exynos_pcie,
PCIE_PHY_PLL_LOCKED);
dev_info(pp->dev, "PLL Locked: 0x%x\n", val);
}
dev_err(pp->dev, "PCIe Link Fail\n");
return -EINVAL;
}
}
dev_info(pp->dev, "Link up\n");
return 0;
}
static void armada8k_pcie_establish_link(struct pcie_port *pp)
{
struct armada8k_pcie *pcie = to_armada8k_pcie(pp);
void __iomem *base = pcie->base;
u32 reg;
if (!dw_pcie_link_up(pp)) {
/* Disable LTSSM state machine to enable configuration */
reg = readl(base + PCIE_GLOBAL_CONTROL_REG);
reg &= ~(PCIE_APP_LTSSM_EN);
writel(reg, base + PCIE_GLOBAL_CONTROL_REG);
}
/* Set the device to root complex mode */
reg = readl(base + PCIE_GLOBAL_CONTROL_REG);
reg &= ~(PCIE_DEVICE_TYPE_MASK << PCIE_DEVICE_TYPE_SHIFT);
reg |= PCIE_DEVICE_TYPE_RC << PCIE_DEVICE_TYPE_SHIFT;
writel(reg, base + PCIE_GLOBAL_CONTROL_REG);
/* Set the PCIe master AxCache attributes */
writel(ARCACHE_DEFAULT_VALUE, base + PCIE_ARCACHE_TRC_REG);
writel(AWCACHE_DEFAULT_VALUE, base + PCIE_AWCACHE_TRC_REG);
/* Set the PCIe master AxDomain attributes */
reg = readl(base + PCIE_ARUSER_REG);
reg &= ~(AX_USER_DOMAIN_MASK << AX_USER_DOMAIN_SHIFT);
reg |= DOMAIN_OUTER_SHAREABLE << AX_USER_DOMAIN_SHIFT;
writel(reg, base + PCIE_ARUSER_REG);
reg = readl(base + PCIE_AWUSER_REG);
reg &= ~(AX_USER_DOMAIN_MASK << AX_USER_DOMAIN_SHIFT);
reg |= DOMAIN_OUTER_SHAREABLE << AX_USER_DOMAIN_SHIFT;
writel(reg, base + PCIE_AWUSER_REG);
/* Enable INT A-D interrupts */
reg = readl(base + PCIE_GLOBAL_INT_MASK1_REG);
reg |= PCIE_INT_A_ASSERT_MASK | PCIE_INT_B_ASSERT_MASK |
PCIE_INT_C_ASSERT_MASK | PCIE_INT_D_ASSERT_MASK;
writel(reg, base + PCIE_GLOBAL_INT_MASK1_REG);
if (!dw_pcie_link_up(pp)) {
/* Configuration done. Start LTSSM */
reg = readl(base + PCIE_GLOBAL_CONTROL_REG);
reg |= PCIE_APP_LTSSM_EN;
writel(reg, base + PCIE_GLOBAL_CONTROL_REG);
}
/* Wait until the link becomes active again */
if (dw_pcie_wait_for_link(pp))
dev_err(pp->dev, "Link not up after reconfiguration\n");
}
static int exynos_pcie_establish_link(struct pcie_port *pp)
{
struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
void __iomem *elbi_base = exynos_pcie->elbi_base;
void __iomem *pmu_base = exynos_pcie->pmu_base;
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "Link already up\n");
return 0;
}
writel(1, pmu_base + PCIE_PHY_CONTROL);
exynos_pcie_assert_phy_reset(pp);
exynos_pcie_sideband_dbi_r_mode(pp, true);
exynos_pcie_sideband_dbi_w_mode(pp, true);
/* setup root complex */
dw_pcie_setup_rc(pp);
exynos_pcie_sideband_dbi_r_mode(pp, false);
exynos_pcie_sideband_dbi_w_mode(pp, false);
/* assert LTSSM enable */
writel(PCIE_ELBI_LTSSM_ENABLE, elbi_base + PCIE_APP_LTSSM_ENABLE);
dev_info(pp->dev, "Link up\n");
return 0;
}
static int histb_pcie_establish_link(struct pcie_port *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct histb_pcie *hipcie = to_histb_pcie(pci);
u32 regval;
if (dw_pcie_link_up(pci)) {
dev_info(pci->dev, "Link already up\n");
return 0;
}
/* PCIe RC work mode */
regval = histb_pcie_readl(hipcie, PCIE_SYS_CTRL0);
regval &= ~PCIE_DEVICE_TYPE_MASK;
regval |= PCIE_WM_RC;
histb_pcie_writel(hipcie, PCIE_SYS_CTRL0, regval);
/* setup root complex */
dw_pcie_setup_rc(pp);
/* assert LTSSM enable */
regval = histb_pcie_readl(hipcie, PCIE_SYS_CTRL7);
regval |= PCIE_APP_LTSSM_ENABLE;
histb_pcie_writel(hipcie, PCIE_SYS_CTRL7, regval);
return dw_pcie_wait_for_link(pci);
}
static int dra7xx_pcie_establish_link(struct pcie_port *pp)
{
u32 reg;
unsigned int retries = 1000;
struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pp);
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "link is already up\n");
return 0;
}
reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD);
reg |= LTSSM_EN;
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD, reg);
while (retries--) {
reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_PHY_CS);
if (reg & LINK_UP)
break;
usleep_range(10, 20);
}
if (retries == 0) {
dev_err(pp->dev, "link is not up\n");
return -ETIMEDOUT;
}
return 0;
}
static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
{
struct dw_pcie *pci = spear13xx_pcie->pci;
struct pcie_port *pp = &pci->pp;
struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
u32 val;
u32 exp_cap_off = EXP_CAP_ID_OFFSET;
if (dw_pcie_link_up(pci)) {
dev_err(pci->dev, "link already up\n");
return 0;
}
dw_pcie_setup_rc(pp);
/*
* this controller support only 128 bytes read size, however its
* default value in capability register is 512 bytes. So force
* it to 128 here.
*/
dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, &val);
val &= ~PCI_EXP_DEVCTL_READRQ;
dw_pcie_write(pci->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, val);
dw_pcie_write(pci->dbi_base + PCI_VENDOR_ID, 2, 0x104A);
dw_pcie_write(pci->dbi_base + PCI_DEVICE_ID, 2, 0xCD80);
/*
* if is_gen1 is set then handle it, so that some buggy card
* also works
*/
if (spear13xx_pcie->is_gen1) {
dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
4, &val);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
dw_pcie_write(pci->dbi_base + exp_cap_off +
PCI_EXP_LNKCAP, 4, val);
}
dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
2, &val);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
dw_pcie_write(pci->dbi_base + exp_cap_off +
PCI_EXP_LNKCTL2, 2, val);
}
}
/* enable ltssm */
writel(DEVICE_TYPE_RC | (1 << MISCTRL_EN_ID)
| (1 << APP_LTSSM_ENABLE_ID)
| ((u32)1 << REG_TRANSLATION_ENABLE),
&app_reg->app_ctrl_0);
return dw_pcie_wait_for_link(pci);
}
static int dra7xx_pcie_establish_link(struct pcie_port *pp)
{
struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pp);
u32 reg;
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "link is already up\n");
return 0;
}
reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD);
reg |= LTSSM_EN;
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD, reg);
return dw_pcie_wait_for_link(pp);
}
static int exynos_pcie_establish_link(struct exynos_pcie *exynos_pcie)
{
struct pcie_port *pp = &exynos_pcie->pp;
struct device *dev = pp->dev;
u32 val;
if (dw_pcie_link_up(pp)) {
dev_err(dev, "Link already up\n");
return 0;
}
exynos_pcie_assert_core_reset(exynos_pcie);
exynos_pcie_assert_phy_reset(exynos_pcie);
exynos_pcie_deassert_phy_reset(exynos_pcie);
exynos_pcie_power_on_phy(exynos_pcie);
exynos_pcie_init_phy(exynos_pcie);
/* pulse for common reset */
exynos_blk_writel(exynos_pcie, 1, PCIE_PHY_COMMON_RESET);
udelay(500);
exynos_blk_writel(exynos_pcie, 0, PCIE_PHY_COMMON_RESET);
exynos_pcie_deassert_core_reset(exynos_pcie);
dw_pcie_setup_rc(pp);
exynos_pcie_assert_reset(exynos_pcie);
/* assert LTSSM enable */
exynos_elb_writel(exynos_pcie, PCIE_ELBI_LTSSM_ENABLE,
PCIE_APP_LTSSM_ENABLE);
/* check if the link is up or not */
if (!dw_pcie_wait_for_link(pp))
return 0;
while (exynos_phy_readl(exynos_pcie, PCIE_PHY_PLL_LOCKED) == 0) {
val = exynos_blk_readl(exynos_pcie, PCIE_PHY_PLL_LOCKED);
dev_info(dev, "PLL Locked: 0x%x\n", val);
}
exynos_pcie_power_off_phy(exynos_pcie);
return -ETIMEDOUT;
}
static int exynos_pcie_establish_link(struct exynos_pcie *ep)
{
struct dw_pcie *pci = ep->pci;
struct pcie_port *pp = &pci->pp;
struct device *dev = pci->dev;
if (dw_pcie_link_up(pci)) {
dev_err(dev, "Link already up\n");
return 0;
}
exynos_pcie_assert_core_reset(ep);
phy_reset(ep->phy);
exynos_pcie_writel(ep->mem_res->elbi_base, 1,
PCIE_PWR_RESET);
phy_power_on(ep->phy);
phy_init(ep->phy);
exynos_pcie_deassert_core_reset(ep);
dw_pcie_setup_rc(pp);
exynos_pcie_assert_reset(ep);
/* assert LTSSM enable */
exynos_pcie_writel(ep->mem_res->elbi_base, PCIE_ELBI_LTSSM_ENABLE,
PCIE_APP_LTSSM_ENABLE);
/* check if the link is up or not */
if (!dw_pcie_wait_for_link(pci))
return 0;
phy_power_off(ep->phy);
return -ETIMEDOUT;
}
static int spear13xx_pcie_establish_link(struct pcie_port *pp)
{
u32 val;
struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp);
struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
u32 exp_cap_off = EXP_CAP_ID_OFFSET;
unsigned int retries;
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "link already up\n");
return 0;
}
dw_pcie_setup_rc(pp);
/*
* this controller support only 128 bytes read size, however its
* default value in capability register is 512 bytes. So force
* it to 128 here.
*/
dw_pcie_cfg_read(pp->dbi_base, exp_cap_off + PCI_EXP_DEVCTL, 4, &val);
val &= ~PCI_EXP_DEVCTL_READRQ;
dw_pcie_cfg_write(pp->dbi_base, exp_cap_off + PCI_EXP_DEVCTL, 4, val);
dw_pcie_cfg_write(pp->dbi_base, PCI_VENDOR_ID, 2, 0x104A);
dw_pcie_cfg_write(pp->dbi_base, PCI_DEVICE_ID, 2, 0xCD80);
/*
* if is_gen1 is set then handle it, so that some buggy card
* also works
*/
if (spear13xx_pcie->is_gen1) {
dw_pcie_cfg_read(pp->dbi_base, exp_cap_off + PCI_EXP_LNKCAP, 4,
&val);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
dw_pcie_cfg_write(pp->dbi_base, exp_cap_off +
PCI_EXP_LNKCAP, 4, val);
}
dw_pcie_cfg_read(pp->dbi_base, exp_cap_off + PCI_EXP_LNKCTL2, 4,
&val);
if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
val &= ~((u32)PCI_EXP_LNKCAP_SLS);
val |= PCI_EXP_LNKCAP_SLS_2_5GB;
dw_pcie_cfg_write(pp->dbi_base, exp_cap_off +
PCI_EXP_LNKCTL2, 4, val);
}
}
/* enable ltssm */
writel(DEVICE_TYPE_RC | (1 << MISCTRL_EN_ID)
| (1 << APP_LTSSM_ENABLE_ID)
| ((u32)1 << REG_TRANSLATION_ENABLE),
&app_reg->app_ctrl_0);
/* check if the link is up or not */
for (retries = 0; retries < 10; retries++) {
if (dw_pcie_link_up(pp)) {
dev_info(pp->dev, "link up\n");
return 0;
}
mdelay(100);
}
dev_err(pp->dev, "link Fail\n");
return -EINVAL;
}
