Subject: [PATCH] PCI: exynos: refactor exynos pcie driver

From: [email-masked] (Alim Akhtar)
Date: Tue, 27 Dec 2016 12:04:02 +0530

Hi Jaehoon,

On 12/27/2016 08:00 AM, Jaehoon Chung wrote:
> On 12/27/2016 11:12 AM, Alim Akhtar wrote:
>>
>>
>> On 12/27/2016 06:39 AM, Jaehoon Chung wrote:
>>> Dear Alim,
>>>
>>> On 12/26/2016 06:46 PM, Alim Akhtar wrote:
>>>> Hello Jaehoon
>>>>
>>>> On 12/26/2016 02:32 PM, Jaehoon Chung wrote:
>>>>> Hi Pankaj,
>>>>>
>>>>> On 12/23/2016 07:56 PM, Pankaj Dubey wrote:
>>>>>> From: Niyas Ahmed S T <[email-masked]>
>>>>>>
>>>>>> Currently Exynos PCIe driver is only supported for Exynos5440 SoC.
>>>>>> This patch does refactoring of Exynos PCIe driver to extend support
>>>>>> for other Exynos SoC.
>>>>>>
>>>>>> Following are the main changes done via this patch:
>>>>>> 1) It adds separate structs for memory, clock resources.
>>>>>> 2) It add exynos_pcie_ops struct which will allow us to support the
>>>>>> differences in resources in different Exynos SoC.
>>>>>
>>>>> It's nice to me for reusing this file.
>>>>> but after considering too many times, i decided not to use this file.
>>>>>
>>>>> I'm not sure what block base is..actually this pci-exynos.c is really black-box.
>>>>> (No one maintains this file, even Samsung didn't care.)
>>>>> Who is using this?
>>>>> If Someone can share the information about exynos5440, i can refactor everything.
>>>>> Otherwise, there are two solution..
>>>>>
>>>>> One is "adding the new pci-exynos.c" likes pci-exynos5433.c
>>>>> Other is "refactor this file" under assuming the each register's usage.
>>>>>
>>>> Its alway good to reuse code as far as possible.
>>>> I am yet to see the details of 5440, but since people are now going to support more Exynos variants, in my opinion, instead of adding pci-exynos5433.c, you can rename current pci-exynos.c to something like pci-exynos5440.c (only in case its too much changes needed to support 5433/exynos7) and lets have a common pci-exynos.c where we can add exynos7/5433 and others SoCs, AFAIK at least exynos7 and 5433 has similar pci controller.
>>>
>>> Yes, It's always good to reuse. but as you know, current pci-exynos.c file is really specific for only exynos5440.
>>> I will try to check about combining.
>>>
>>>>> I want to use the PHY generic Framework for EXYNOS PCIe.
>>>>>
>>>> I don't think you have an option here, you should use generic PHY APIs, otherwise phy drive should go to drivers/misc.
>>>> Other thoughts are welcome.
>>>
>>> Why go to drivers/misc? There is driver/phy/ for PHY generic Framework.
>>> If i will touch this file, then i will put our phy-exynos-pcie file under driver/phy/ .
>>> I already sent the patch for this. Could you check them?
>>>
>> My point was, if you are not going to use generic PHY APIs, then phy driver should go into drivers/misc. Anyway as you said you have already posted patches with generic phy framework, I will take a look.
>
> Ah. Right..And i'm doing the refactoring to reuse the current pci-exynos.c.
There is a nice refactoring patch posted by Pankaj recently @
https://lkml.org/lkml/2016/12/23/73
I would suggest you to rebase your work on this top.

> Maybe..Today or Tomorrow..I will send the patches..At that time, could you also check them?
> Any comments might be helpful to me! :)
>
Will wait for you patches :-)

> Best Regards,
> Jaehoon Chung
>
>>> http://patchwork.ozlabs.org/patch/708738/
>>> http://patchwork.ozlabs.org/patch/708742/
>>>
>> Thanks.
>>
>>> Best Regards,
>>> Jaehoon Chung
>>>
>>>>
>>>>> If you or other guys really want to use the pci-exynos.c for other exynos,
>>>>> I will rework with PHY generic framework. Then i will resend the my patches as V2.
>>>>>
>>>>> One more thing..Does anyone know what the usage of block base is?
>>>>> Can i use that register as "syscon"?
>>>>>
>>>>> Best Regards,
>>>>> Jaehoon Chung
>>>>>
>>>>>>
>>>>>> No functional change intended.
>>>>>>
>>>>>> Signed-off-by: Niyas Ahmed S T <[email-masked]>
>>>>>> Signed-off-by: Pankaj Dubey <[email-masked]>
>>>>>> ---
>>>>>> This patch set is prepared on top of Krzysztof's for-next and
>>>>>> PCIe driver cleanup patch [1] by Jaehoon Chung.
>>>>>>
>>>>>> [1]: https://lkml.org/lkml/2016/12/19/44
>>>>>>
>>>>>>
>>>>>>     drivers/pci/host/pci-exynos.c | 346 ++++++++++++++++++++++++++----------------
>>>>>>     1 file changed, 217 insertions(+), 129 deletions(-)
>>>>>>
>>>>>> diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c
>>>>>> index 33562cf..2dc54f7 100644
>>>>>> --- a/drivers/pci/host/pci-exynos.c
>>>>>> +++ b/drivers/pci/host/pci-exynos.c
>>>>>> @@ -17,6 +17,7 @@
>>>>>>     #include <linux/interrupt.h>
>>>>>>     #include <linux/kernel.h>
>>>>>>     #include <linux/init.h>
>>>>>> +#include <linux/of_device.h>
>>>>>>     #include <linux/of_gpio.h>
>>>>>>     #include <linux/pci.h>
>>>>>>     #include <linux/platform_device.h>
>>>>>> @@ -28,16 +29,6 @@
>>>>>>
>>>>>>     #define to_exynos_pcie(x)    container_of(x, struct exynos_pcie, pp)
>>>>>>
>>>>>> -struct exynos_pcie {
>>>>>> -    struct pcie_port    pp;
>>>>>> -    void __iomem        *elbi_base;    /* DT 0th resource */
>>>>>> -    void __iomem        *phy_base;    /* DT 1st resource */
>>>>>> -    void __iomem        *block_base;    /* DT 2nd resource */
>>>>>> -    int            reset_gpio;
>>>>>> -    struct clk        *clk;
>>>>>> -    struct clk        *bus_clk;
>>>>>> -};
>>>>>> -
>>>>>>     /* PCIe ELBI registers */
>>>>>>     #define PCIE_IRQ_PULSE            0x000
>>>>>>     #define IRQ_INTA_ASSERT            BIT(0)
>>>>>> @@ -102,6 +93,122 @@ struct exynos_pcie {
>>>>>>     #define PCIE_PHY_TRSV3_PD_TSV        BIT(7)
>>>>>>     #define PCIE_PHY_TRSV3_LVCC        0x31c
>>>>>>
>>>>>> +struct exynos_pcie_mem_res {
>>>>>> +    void __iomem *elbi_base; /* DT 0th resource: PCIE CTRL */
>>>>>> +    void __iomem *phy_base; /* DT 1st resource: PHY CTRL */
>>>>>> +    void __iomem *block_base; /* DT 2nd resource: PHY ADDITIONAL CTRL */
>>>>>> +};
>>>>>> +
>>>>>> +struct exynos_pcie_clk_res {
>>>>>> +    struct clk *clk;
>>>>>> +    struct clk *bus_clk;
>>>>>> +};
>>>>>> +
>>>>>> +struct exynos_pcie {
>>>>>> +    struct pcie_port        pp;
>>>>>> +    struct exynos_pcie_mem_res    *mem_res;
>>>>>> +    struct exynos_pcie_clk_res    *clk_res;
>>>>>> +    const struct exynos_pcie_ops    *ops;
>>>>>> +    int                reset_gpio;
>>>>>> +};
>>>>>> +
>>>>>> +struct exynos_pcie_ops {
>>>>>> +    int (*get_mem_resources)(struct platform_device *pdev,
>>>>>> +            struct exynos_pcie *ep);
>>>>>> +    int (*get_clk_resources)(struct exynos_pcie *ep);
>>>>>> +    int (*init_clk_resources)(struct exynos_pcie *ep);
>>>>>> +    void (*deinit_clk_resources)(struct exynos_pcie *ep);
>>>>>> +};
>>>>>> +
>>>>>> +static int exynos5440_pcie_get_mem_resources(struct platform_device *pdev,
>>>>>> +                        struct exynos_pcie *ep)
>>>>>> +{
>>>>>> +    struct resource *res;
>>>>>> +    struct device *dev = ep->pp.dev;
>>>>>> +
>>>>>> +    ep->mem_res = devm_kzalloc(dev, sizeof(*ep->mem_res), GFP_KERNEL);
>>>>>> +    if (!ep->mem_res)
>>>>>> +        return -ENOMEM;
>>>>>> +
>>>>>> +    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>>>>> +    ep->mem_res->elbi_base = devm_ioremap_resource(dev, res);
>>>>>> +    if (IS_ERR(ep->mem_res->elbi_base))
>>>>>> +        return PTR_ERR(ep->mem_res->elbi_base);
>>>>>> +
>>>>>> +    res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
>>>>>> +    ep->mem_res->phy_base = devm_ioremap_resource(dev, res);
>>>>>> +    if (IS_ERR(ep->mem_res->phy_base))
>>>>>> +        return PTR_ERR(ep->mem_res->phy_base);
>>>>>> +
>>>>>> +    res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
>>>>>> +    ep->mem_res->block_base = devm_ioremap_resource(dev, res);
>>>>>> +    if (IS_ERR(ep->mem_res->block_base))
>>>>>> +        return PTR_ERR(ep->mem_res->block_base);
>>>>>> +
>>>>>> +    return 0;
>>>>>> +}
>>>>>> +
>>>>>> +static int exynos5440_pcie_get_clk_resources(struct exynos_pcie *ep)
>>>>>> +{
>>>>>> +    struct device *dev = ep->pp.dev;
>>>>>> +
>>>>>> +    ep->clk_res = devm_kzalloc(dev, sizeof(*ep->clk_res), GFP_KERNEL);
>>>>>> +    if (!ep->clk_res)
>>>>>> +        return -ENOMEM;
>>>>>> +
>>>>>> +    ep->clk_res->clk = devm_clk_get(dev, "pcie");
>>>>>> +    if (IS_ERR(ep->clk_res->clk)) {
>>>>>> +        dev_err(dev, "Failed to get pcie rc clock\n");
>>>>>> +        return PTR_ERR(ep->clk_res->clk);
>>>>>> +    }
>>>>>> +
>>>>>> +    ep->clk_res->bus_clk = devm_clk_get(dev, "pcie_bus");
>>>>>> +    if (IS_ERR(ep->clk_res->bus_clk)) {
>>>>>> +        dev_err(dev, "Failed to get pcie bus clock\n");
>>>>>> +        return PTR_ERR(ep->clk_res->bus_clk);
>>>>>> +    }
>>>>>> +
>>>>>> +    return 0;
>>>>>> +}
>>>>>> +
>>>>>> +static int exynos5440_pcie_init_clk_resources(struct exynos_pcie *ep)
>>>>>> +{
>>>>>> +    struct device *dev = ep->pp.dev;
>>>>>> +    int ret;
>>>>>> +
>>>>>> +    ret = clk_prepare_enable(ep->clk_res->clk);
>>>>>> +    if (ret) {
>>>>>> +        dev_err(dev, "cannot enable pcie rc clock");
>>>>>> +        return ret;
>>>>>> +    }
>>>>>> +
>>>>>> +    ret = clk_prepare_enable(ep->clk_res->bus_clk);
>>>>>> +    if (ret) {
>>>>>> +        dev_err(dev, "cannot enable pcie bus clock");
>>>>>> +        goto err_bus_clk;
>>>>>> +    }
>>>>>> +
>>>>>> +    return 0;
>>>>>> +
>>>>>> +err_bus_clk:
>>>>>> +    clk_disable_unprepare(ep->clk_res->clk);
>>>>>> +
>>>>>> +    return ret;
>>>>>> +}
>>>>>> +
>>>>>> +static void exynos5440_pcie_deinit_clk_resources(struct exynos_pcie *ep)
>>>>>> +{
>>>>>> +    clk_disable_unprepare(ep->clk_res->bus_clk);
>>>>>> +    clk_disable_unprepare(ep->clk_res->clk);
>>>>>> +}
>>>>>> +
>>>>>> +static const struct exynos_pcie_ops exynos5440_pcie_ops = {
>>>>>> +    .get_mem_resources    = exynos5440_pcie_get_mem_resources,
>>>>>> +    .get_clk_resources    = exynos5440_pcie_get_clk_resources,
>>>>>> +    .init_clk_resources    = exynos5440_pcie_init_clk_resources,
>>>>>> +    .deinit_clk_resources    = exynos5440_pcie_deinit_clk_resources,
>>>>>> +};
>>>>>> +
>>>>>>     static void exynos_pcie_writel(void __iomem *base, u32 val, u32 reg)
>>>>>>     {
>>>>>>         writel(val, base + reg);
>>>>>> @@ -116,155 +223,155 @@ static void exynos_pcie_sideband_dbi_w_mode(struct exynos_pcie *ep, bool on)
>>>>>>     {
>>>>>>         u32 val;
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->elbi_base, PCIE_ELBI_SLV_AWMISC);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->elbi_base, PCIE_ELBI_SLV_AWMISC);
>>>>>>         if (on)
>>>>>>             val |= PCIE_ELBI_SLV_DBI_ENABLE;
>>>>>>         else
>>>>>>             val &= ~PCIE_ELBI_SLV_DBI_ENABLE;
>>>>>> -    exynos_pcie_writel(ep->elbi_base, val, PCIE_ELBI_SLV_AWMISC);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, val, PCIE_ELBI_SLV_AWMISC);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_sideband_dbi_r_mode(struct exynos_pcie *ep, bool on)
>>>>>>     {
>>>>>>         u32 val;
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->elbi_base, PCIE_ELBI_SLV_ARMISC);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->elbi_base, PCIE_ELBI_SLV_ARMISC);
>>>>>>         if (on)
>>>>>>             val |= PCIE_ELBI_SLV_DBI_ENABLE;
>>>>>>         else
>>>>>>             val &= ~PCIE_ELBI_SLV_DBI_ENABLE;
>>>>>> -    exynos_pcie_writel(ep->elbi_base, val, PCIE_ELBI_SLV_ARMISC);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, val, PCIE_ELBI_SLV_ARMISC);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_assert_core_reset(struct exynos_pcie *ep)
>>>>>>     {
>>>>>>         u32 val;
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->elbi_base, PCIE_CORE_RESET);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->elbi_base, PCIE_CORE_RESET);
>>>>>>         val &= ~PCIE_CORE_RESET_ENABLE;
>>>>>> -    exynos_pcie_writel(ep->elbi_base, val, PCIE_CORE_RESET);
>>>>>> -    exynos_pcie_writel(ep->elbi_base, 0, PCIE_PWR_RESET);
>>>>>> -    exynos_pcie_writel(ep->elbi_base, 0, PCIE_STICKY_RESET);
>>>>>> -    exynos_pcie_writel(ep->elbi_base, 0, PCIE_NONSTICKY_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, val, PCIE_CORE_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, 0, PCIE_PWR_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, 0, PCIE_STICKY_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, 0, PCIE_NONSTICKY_RESET);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_deassert_core_reset(struct exynos_pcie *ep)
>>>>>>     {
>>>>>>         u32 val;
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->elbi_base, PCIE_CORE_RESET);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->elbi_base, PCIE_CORE_RESET);
>>>>>>         val |= PCIE_CORE_RESET_ENABLE;
>>>>>>
>>>>>> -    exynos_pcie_writel(ep->elbi_base, val, PCIE_CORE_RESET);
>>>>>> -    exynos_pcie_writel(ep->elbi_base, 1, PCIE_STICKY_RESET);
>>>>>> -    exynos_pcie_writel(ep->elbi_base, 1, PCIE_NONSTICKY_RESET);
>>>>>> -    exynos_pcie_writel(ep->elbi_base, 1, PCIE_APP_INIT_RESET);
>>>>>> -    exynos_pcie_writel(ep->elbi_base, 0, PCIE_APP_INIT_RESET);
>>>>>> -    exynos_pcie_writel(ep->block_base, 1, PCIE_PHY_MAC_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, val, PCIE_CORE_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, 1, PCIE_STICKY_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, 1, PCIE_NONSTICKY_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, 1, PCIE_APP_INIT_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, 0, PCIE_APP_INIT_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->block_base, 1, PCIE_PHY_MAC_RESET);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_assert_phy_reset(struct exynos_pcie *ep)
>>>>>>     {
>>>>>> -    exynos_pcie_writel(ep->block_base, 0, PCIE_PHY_MAC_RESET);
>>>>>> -    exynos_pcie_writel(ep->block_base, 1, PCIE_PHY_GLOBAL_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->block_base, 0, PCIE_PHY_MAC_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->block_base, 1, PCIE_PHY_GLOBAL_RESET);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_deassert_phy_reset(struct exynos_pcie *ep)
>>>>>>     {
>>>>>> -    exynos_pcie_writel(ep->block_base, 0, PCIE_PHY_GLOBAL_RESET);
>>>>>> -    exynos_pcie_writel(ep->elbi_base, 1, PCIE_PWR_RESET);
>>>>>> -    exynos_pcie_writel(ep->block_base, 0, PCIE_PHY_COMMON_RESET);
>>>>>> -    exynos_pcie_writel(ep->block_base, 0, PCIE_PHY_CMN_REG);
>>>>>> -    exynos_pcie_writel(ep->block_base, 0, PCIE_PHY_TRSVREG_RESET);
>>>>>> -    exynos_pcie_writel(ep->block_base, 0, PCIE_PHY_TRSV_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->block_base, 0, PCIE_PHY_GLOBAL_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, 1, PCIE_PWR_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->block_base, 0, PCIE_PHY_COMMON_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->block_base, 0, PCIE_PHY_CMN_REG);
>>>>>> +    exynos_pcie_writel(ep->mem_res->block_base, 0, PCIE_PHY_TRSVREG_RESET);
>>>>>> +    exynos_pcie_writel(ep->mem_res->block_base, 0, PCIE_PHY_TRSV_RESET);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_power_on_phy(struct exynos_pcie *ep)
>>>>>>     {
>>>>>>         u32 val;
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_COMMON_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_COMMON_POWER);
>>>>>>         val &= ~PCIE_PHY_COMMON_PD_CMN;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_COMMON_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_COMMON_POWER);
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_TRSV0_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_TRSV0_POWER);
>>>>>>         val &= ~PCIE_PHY_TRSV0_PD_TSV;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_TRSV0_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_TRSV0_POWER);
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_TRSV1_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_TRSV1_POWER);
>>>>>>         val &= ~PCIE_PHY_TRSV1_PD_TSV;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_TRSV1_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_TRSV1_POWER);
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_TRSV2_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_TRSV2_POWER);
>>>>>>         val &= ~PCIE_PHY_TRSV2_PD_TSV;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_TRSV2_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_TRSV2_POWER);
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_TRSV3_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_TRSV3_POWER);
>>>>>>         val &= ~PCIE_PHY_TRSV3_PD_TSV;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_TRSV3_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_TRSV3_POWER);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_power_off_phy(struct exynos_pcie *ep)
>>>>>>     {
>>>>>>         u32 val;
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_COMMON_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_COMMON_POWER);
>>>>>>         val |= PCIE_PHY_COMMON_PD_CMN;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_COMMON_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_COMMON_POWER);
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_TRSV0_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_TRSV0_POWER);
>>>>>>         val |= PCIE_PHY_TRSV0_PD_TSV;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_TRSV0_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_TRSV0_POWER);
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_TRSV1_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_TRSV1_POWER);
>>>>>>         val |= PCIE_PHY_TRSV1_PD_TSV;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_TRSV1_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_TRSV1_POWER);
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_TRSV2_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_TRSV2_POWER);
>>>>>>         val |= PCIE_PHY_TRSV2_PD_TSV;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_TRSV2_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_TRSV2_POWER);
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->phy_base, PCIE_PHY_TRSV3_POWER);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->phy_base, PCIE_PHY_TRSV3_POWER);
>>>>>>         val |= PCIE_PHY_TRSV3_PD_TSV;
>>>>>> -    exynos_pcie_writel(ep->phy_base, val, PCIE_PHY_TRSV3_POWER);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, val, PCIE_PHY_TRSV3_POWER);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_init_phy(struct exynos_pcie *ep)
>>>>>>     {
>>>>>>         /* DCC feedback control off */
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x29, PCIE_PHY_DCC_FEEDBACK);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x29, PCIE_PHY_DCC_FEEDBACK);
>>>>>>
>>>>>>         /* set TX/RX impedance */
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0xd5, PCIE_PHY_IMPEDANCE);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0xd5, PCIE_PHY_IMPEDANCE);
>>>>>>
>>>>>>         /* set 50Mhz PHY clock */
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x14, PCIE_PHY_PLL_DIV_0);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x12, PCIE_PHY_PLL_DIV_1);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x14, PCIE_PHY_PLL_DIV_0);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x12, PCIE_PHY_PLL_DIV_1);
>>>>>>
>>>>>>         /* set TX Differential output for lane 0 */
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x7f, PCIE_PHY_TRSV0_DRV_LVL);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x7f, PCIE_PHY_TRSV0_DRV_LVL);
>>>>>>
>>>>>>         /* set TX Pre-emphasis Level Control for lane 0 to minimum */
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x0, PCIE_PHY_TRSV0_EMP_LVL);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x0, PCIE_PHY_TRSV0_EMP_LVL);
>>>>>>
>>>>>>         /* set RX clock and data recovery bandwidth */
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0xe7, PCIE_PHY_PLL_BIAS);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x82, PCIE_PHY_TRSV0_RXCDR);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x82, PCIE_PHY_TRSV1_RXCDR);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x82, PCIE_PHY_TRSV2_RXCDR);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x82, PCIE_PHY_TRSV3_RXCDR);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0xe7, PCIE_PHY_PLL_BIAS);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x82, PCIE_PHY_TRSV0_RXCDR);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x82, PCIE_PHY_TRSV1_RXCDR);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x82, PCIE_PHY_TRSV2_RXCDR);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x82, PCIE_PHY_TRSV3_RXCDR);
>>>>>>
>>>>>>         /* change TX Pre-emphasis Level Control for lanes */
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x39, PCIE_PHY_TRSV0_EMP_LVL);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x39, PCIE_PHY_TRSV1_EMP_LVL);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x39, PCIE_PHY_TRSV2_EMP_LVL);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x39, PCIE_PHY_TRSV3_EMP_LVL);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x39, PCIE_PHY_TRSV0_EMP_LVL);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x39, PCIE_PHY_TRSV1_EMP_LVL);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x39, PCIE_PHY_TRSV2_EMP_LVL);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x39, PCIE_PHY_TRSV3_EMP_LVL);
>>>>>>
>>>>>>         /* set LVCC */
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0x20, PCIE_PHY_TRSV0_LVCC);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0xa0, PCIE_PHY_TRSV1_LVCC);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0xa0, PCIE_PHY_TRSV2_LVCC);
>>>>>> -    exynos_pcie_writel(ep->phy_base, 0xa0, PCIE_PHY_TRSV3_LVCC);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0x20, PCIE_PHY_TRSV0_LVCC);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0xa0, PCIE_PHY_TRSV1_LVCC);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0xa0, PCIE_PHY_TRSV2_LVCC);
>>>>>> +    exynos_pcie_writel(ep->mem_res->phy_base, 0xa0, PCIE_PHY_TRSV3_LVCC);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_assert_reset(struct exynos_pcie *exynos_pcie)
>>>>>> @@ -295,25 +402,27 @@ static int exynos_pcie_establish_link(struct exynos_pcie *exynos_pcie)
>>>>>>         exynos_pcie_init_phy(exynos_pcie);
>>>>>>
>>>>>>         /* pulse for common reset */
>>>>>> -    exynos_pcie_writel(exynos_pcie->block_base, 1, PCIE_PHY_COMMON_RESET);
>>>>>> +    exynos_pcie_writel(exynos_pcie->mem_res->block_base, 1,
>>>>>> +                PCIE_PHY_COMMON_RESET);
>>>>>>         udelay(500);
>>>>>> -    exynos_pcie_writel(exynos_pcie->block_base, 0, PCIE_PHY_COMMON_RESET);
>>>>>> +    exynos_pcie_writel(exynos_pcie->mem_res->block_base, 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_pcie_writel(exynos_pcie->elbi_base, PCIE_ELBI_LTSSM_ENABLE,
>>>>>> -              PCIE_APP_LTSSM_ENABLE);
>>>>>> +    exynos_pcie_writel(exynos_pcie->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(pp))
>>>>>>             return 0;
>>>>>>
>>>>>> -    while (exynos_pcie_readl(exynos_pcie->phy_base,
>>>>>> +    while (exynos_pcie_readl(exynos_pcie->mem_res->phy_base,
>>>>>>                     PCIE_PHY_PLL_LOCKED) == 0) {
>>>>>> -        val = exynos_pcie_readl(exynos_pcie->block_base,
>>>>>> +        val = exynos_pcie_readl(exynos_pcie->mem_res->block_base,
>>>>>>                     PCIE_PHY_PLL_LOCKED);
>>>>>>             dev_info(dev, "PLL Locked: 0x%x\n", val);
>>>>>>         }
>>>>>> @@ -325,8 +434,8 @@ static void exynos_pcie_clear_irq_pulse(struct exynos_pcie *ep)
>>>>>>     {
>>>>>>         u32 val;
>>>>>>
>>>>>> -    val = exynos_pcie_readl(ep->elbi_base, PCIE_IRQ_PULSE);
>>>>>> -    exynos_pcie_writel(ep->elbi_base, val, PCIE_IRQ_PULSE);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->elbi_base, PCIE_IRQ_PULSE);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, val, PCIE_IRQ_PULSE);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_enable_irq_pulse(struct exynos_pcie *ep)
>>>>>> @@ -336,7 +445,7 @@ static void exynos_pcie_enable_irq_pulse(struct exynos_pcie *ep)
>>>>>>         /* enable INTX interrupt */
>>>>>>         val = IRQ_INTA_ASSERT | IRQ_INTB_ASSERT |
>>>>>>             IRQ_INTC_ASSERT | IRQ_INTD_ASSERT;
>>>>>> -    exynos_pcie_writel(ep->elbi_base, val, PCIE_IRQ_EN_PULSE);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, val, PCIE_IRQ_EN_PULSE);
>>>>>>     }
>>>>>>
>>>>>>     static irqreturn_t exynos_pcie_irq_handler(int irq, void *arg)
>>>>>> @@ -363,9 +472,9 @@ static void exynos_pcie_msi_init(struct exynos_pcie *ep)
>>>>>>         dw_pcie_msi_init(pp);
>>>>>>
>>>>>>         /* enable MSI interrupt */
>>>>>> -    val = exynos_pcie_readl(ep->elbi_base, PCIE_IRQ_EN_LEVEL);
>>>>>> +    val = exynos_pcie_readl(ep->mem_res->elbi_base, PCIE_IRQ_EN_LEVEL);
>>>>>>         val |= IRQ_MSI_ENABLE;
>>>>>> -    exynos_pcie_writel(ep->elbi_base, val, PCIE_IRQ_EN_LEVEL);
>>>>>> +    exynos_pcie_writel(ep->mem_res->elbi_base, val, PCIE_IRQ_EN_LEVEL);
>>>>>>     }
>>>>>>
>>>>>>     static void exynos_pcie_enable_interrupts(struct exynos_pcie *exynos_pcie)
>>>>>> @@ -425,7 +534,8 @@ static int exynos_pcie_link_up(struct pcie_port *pp)
>>>>>>         struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
>>>>>>         u32 val;
>>>>>>
>>>>>> -    val = exynos_pcie_readl(exynos_pcie->elbi_base, PCIE_ELBI_RDLH_LINKUP);
>>>>>> +    val = exynos_pcie_readl(exynos_pcie->mem_res->elbi_base,
>>>>>> +                    PCIE_ELBI_RDLH_LINKUP);
>>>>>>         if (val == PCIE_ELBI_LTSSM_ENABLE)
>>>>>>             return 1;
>>>>>>
>>>>>> @@ -503,7 +613,6 @@ static int __init exynos_pcie_probe(struct platform_device *pdev)
>>>>>>         struct exynos_pcie *exynos_pcie;
>>>>>>         struct pcie_port *pp;
>>>>>>         struct device_node *np = dev->of_node;
>>>>>> -    struct resource *res;
>>>>>>         int ret;
>>>>>>
>>>>>>         exynos_pcie = devm_kzalloc(dev, sizeof(*exynos_pcie), GFP_KERNEL);
>>>>>> @@ -513,59 +622,37 @@ static int __init exynos_pcie_probe(struct platform_device *pdev)
>>>>>>         pp = &exynos_pcie->pp;
>>>>>>         pp->dev = dev;
>>>>>>
>>>>>> -    exynos_pcie->reset_gpio = of_get_named_gpio(np, "reset-gpio", 0);
>>>>>> -
>>>>>> -    exynos_pcie->clk = devm_clk_get(dev, "pcie");
>>>>>> -    if (IS_ERR(exynos_pcie->clk)) {
>>>>>> -        dev_err(dev, "Failed to get pcie rc clock\n");
>>>>>> -        return PTR_ERR(exynos_pcie->clk);
>>>>>> -    }
>>>>>> -    ret = clk_prepare_enable(exynos_pcie->clk);
>>>>>> -    if (ret)
>>>>>> -        return ret;
>>>>>> +    exynos_pcie->ops = (const struct exynos_pcie_ops *)
>>>>>> +                of_device_get_match_data(dev);
>>>>>>
>>>>>> -    exynos_pcie->bus_clk = devm_clk_get(dev, "pcie_bus");
>>>>>> -    if (IS_ERR(exynos_pcie->bus_clk)) {
>>>>>> -        dev_err(dev, "Failed to get pcie bus clock\n");
>>>>>> -        ret = PTR_ERR(exynos_pcie->bus_clk);
>>>>>> -        goto fail_clk;
>>>>>> -    }
>>>>>> -    ret = clk_prepare_enable(exynos_pcie->bus_clk);
>>>>>> -    if (ret)
>>>>>> -        goto fail_clk;
>>>>>> +    exynos_pcie->reset_gpio = of_get_named_gpio(np, "reset-gpio", 0);
>>>>>>
>>>>>> -    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>>>>> -    exynos_pcie->elbi_base = devm_ioremap_resource(dev, res);
>>>>>> -    if (IS_ERR(exynos_pcie->elbi_base)) {
>>>>>> -        ret = PTR_ERR(exynos_pcie->elbi_base);
>>>>>> -        goto fail_bus_clk;
>>>>>> +    if (exynos_pcie->ops && exynos_pcie->ops->get_mem_resources) {
>>>>>> +        ret = exynos_pcie->ops->get_mem_resources(pdev, exynos_pcie);
>>>>>> +        if (ret)
>>>>>> +            return ret;
>>>>>>         }
>>>>>>
>>>>>> -    res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
>>>>>> -    exynos_pcie->phy_base = devm_ioremap_resource(dev, res);
>>>>>> -    if (IS_ERR(exynos_pcie->phy_base)) {
>>>>>> -        ret = PTR_ERR(exynos_pcie->phy_base);
>>>>>> -        goto fail_bus_clk;
>>>>>> -    }
>>>>>> +    if (exynos_pcie->ops && exynos_pcie->ops->get_clk_resources) {
>>>>>> +        ret = exynos_pcie->ops->get_clk_resources(exynos_pcie);
>>>>>> +        if (ret)
>>>>>> +            return ret;
>>>>>>
>>>>>> -    res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
>>>>>> -    exynos_pcie->block_base = devm_ioremap_resource(dev, res);
>>>>>> -    if (IS_ERR(exynos_pcie->block_base)) {
>>>>>> -        ret = PTR_ERR(exynos_pcie->block_base);
>>>>>> -        goto fail_bus_clk;
>>>>>> +        ret = exynos_pcie->ops->init_clk_resources(exynos_pcie);
>>>>>> +        if (ret)
>>>>>> +            return ret;
>>>>>>         }
>>>>>>
>>>>>>         ret = exynos_add_pcie_port(exynos_pcie, pdev);
>>>>>>         if (ret < 0)
>>>>>> -        goto fail_bus_clk;
>>>>>> +        goto fail_probe;
>>>>>>
>>>>>>         platform_set_drvdata(pdev, exynos_pcie);
>>>>>>         return 0;
>>>>>>
>>>>>> -fail_bus_clk:
>>>>>> -    clk_disable_unprepare(exynos_pcie->bus_clk);
>>>>>> -fail_clk:
>>>>>> -    clk_disable_unprepare(exynos_pcie->clk);
>>>>>> +fail_probe:
>>>>>> +    if (exynos_pcie->ops && exynos_pcie->ops->deinit_clk_resources)
>>>>>> +        exynos_pcie->ops->deinit_clk_resources(exynos_pcie);
>>>>>>         return ret;
>>>>>>     }
>>>>>>
>>>>>> @@ -573,14 +660,15 @@ static int __exit exynos_pcie_remove(struct platform_device *pdev)
>>>>>>     {
>>>>>>         struct exynos_pcie *exynos_pcie = platform_get_drvdata(pdev);
>>>>>>
>>>>>> -    clk_disable_unprepare(exynos_pcie->bus_clk);
>>>>>> -    clk_disable_unprepare(exynos_pcie->clk);
>>>>>> +    if (exynos_pcie->ops && exynos_pcie->ops->deinit_clk_resources)
>>>>>> +        exynos_pcie->ops->deinit_clk_resources(exynos_pcie);
>>>>>>
>>>>>>         return 0;
>>>>>>     }
>>>>>>
>>>>>>     static const struct of_device_id exynos_pcie_of_match[] = {
>>>>>> -    { .compatible = "samsung,exynos5440-pcie", },
>>>>>> +    {    .compatible = "samsung,exynos5440-pcie",
>>>>>> +        .data = &exynos5440_pcie_ops },
>>>>>>         {},
>>>>>>     };
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>
>
>