[PATCH 2/2] net wireless wcn36xx adapt wcnss platform to select module by DT
Eugene Krasnikov
k.eugene.e at gmail.com
Mon Jan 19 00:49:54 PST 2015
Have you tested this code on any device other than wcn3620?
2015-01-19 8:44 GMT+00:00 Andy Green <andy.green at linaro.org>:
> On 19 January 2015 at 16:34, Eugene Krasnikov <k.eugene.e at gmail.com> wrote:
>
>> So how do we insmod wcn36xx_msm with a parameter specifying what type
>> of hardware do we use?
>
> The type of chip is defined in the DT "compatible" which also delivers
> the resource information.
>
> qcom,wcn36xx at 0a000000 {
> compatible = "qcom,wcn3620";
> reg = <0x0a000000 0x280000>;
> reg-names = "wcnss_mmio";
>
> interrupts = <0 145 0 0 146 0>;
> interrupt-names = "wcnss_wlantx_irq", "wcnss_wlanrx_irq";
> ...
>
> This bit based on your code can't go in mainline until there's some
> kind of PIL support.
>
> So the only things we can discuss about it for mainline purpose is
> whether using a platform ops is a good way to interface to the
> mainline driver.
>
> If you're OK with that and you want a module parameter then this can
> grow a module parameter and prefer to deliver the chip type from that
> if given, without modifying the platform op interface.
>
> But with or without a module parameter this can't be upstreamed right
> now due to PIL.
>
> -Andy
>
>> 2015-01-18 5:16 GMT+00:00 Andy Green <andy.green at linaro.org>:
>>> Simplify the resource handling and use DT to indicate which chip type
>>> we are dealing with
>>>
>>> Signed-off-by: Andy Green <andy.green at linaro.org>
>>> ---
>>> drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c | 101 ++++++++++++------------
>>> 1 file changed, 52 insertions(+), 49 deletions(-)
>>>
>>> diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c b/drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c
>>> index f6f6c83..c9250e0 100644
>>> --- a/drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c
>>> +++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c
>>> @@ -42,7 +42,10 @@ struct wcn36xx_msm {
>>> struct completion smd_compl;
>>> smd_channel_t *smd_ch;
>>> struct pinctrl *pinctrl;
>>> -} wmsm;
>>> + enum wcn36xx_chip_type chip_type;
>>> +};
>>> +
>>> +static struct wcn36xx_msm wmsm;
>>>
>>> static int wcn36xx_msm_smsm_change_state(u32 clear_mask, u32 set_mask)
>>> {
>>> @@ -217,14 +220,47 @@ int wcn36xx_msm_powerup(const struct subsys_desc *desc)
>>> return 0;
>>> }
>>>
>>> +static const struct of_device_id wcn36xx_msm_match_table[] = {
>>> + { .compatible = "qcom,wcn3660", .data = (void *)WCN36XX_CHIP_3660 },
>>> + { .compatible = "qcom,wcn3680", .data = (void *)WCN36XX_CHIP_3680 },
>>> + { .compatible = "qcom,wcn3620", .data = (void *)WCN36XX_CHIP_3620 },
>>> + { }
>>> +};
>>> +
>>> +static int wcn36xx_msm_get_chip_type(void)
>>> +{
>>> + return wmsm.chip_type;
>>> +}
>>> +
>>> +static struct wcn36xx_msm wmsm = {
>>> + .ctrl_ops = {
>>> + .open = wcn36xx_msm_smd_open,
>>> + .close = wcn36xx_msm_smd_close,
>>> + .tx = wcn36xx_msm_smd_send_and_wait,
>>> + .get_hw_mac = wcn36xx_msm_get_hw_mac,
>>> + .smsm_change_state = wcn36xx_msm_smsm_change_state,
>>> + .get_chip_type = wcn36xx_msm_get_chip_type,
>>> + },
>>> +};
>>> +
>>> static int wcn36xx_msm_probe(struct platform_device *pdev)
>>> {
>>> int ret;
>>> - struct resource *wcnss_memory;
>>> - struct resource *tx_irq;
>>> - struct resource *rx_irq;
>>> + const struct of_device_id *of_id;
>>> + struct resource *r;
>>> struct resource res[3];
>>> struct pinctrl_state *ps;
>>> + static const char const *rnames[] = {
>>> + "wcnss_mmio", "wcnss_wlantx_irq", "wcnss_wlanrx_irq" };
>>> + static const int rtype[] = {
>>> + IORESOURCE_MEM, IORESOURCE_IRQ, IORESOURCE_IRQ };
>>> + int n;
>>> +
>>> + of_id = of_match_node(wcn36xx_msm_match_table, pdev->dev.of_node);
>>> + if (!of_id)
>>> + return -EINVAL;
>>> +
>>> + wmsm.chip_type = (enum wcn36xx_chip_type)of_id->data;
>>>
>>> wmsm.pinctrl = devm_pinctrl_get(&pdev->dev);
>>> if (IS_ERR_OR_NULL(wmsm.pinctrl))
>>> @@ -240,52 +276,23 @@ static int wcn36xx_msm_probe(struct platform_device *pdev)
>>>
>>> if (IS_ERR_OR_NULL(pil))
>>> pil = subsystem_get("wcnss");
>>> - if (IS_ERR_OR_NULL(pil))
>>> - return PTR_ERR(pil);
>>> + if (IS_ERR_OR_NULL(pil))
>>> + return PTR_ERR(pil);
>>>
>>> wmsm.core = platform_device_alloc("wcn36xx", -1);
>>>
>>> - //dev_err(&pdev->dev, "%s starting\n", __func__);
>>> -
>>> - memset(res, 0x00, sizeof(res));
>>> - wmsm.ctrl_ops.open = wcn36xx_msm_smd_open;
>>> - wmsm.ctrl_ops.close = wcn36xx_msm_smd_close;
>>> - wmsm.ctrl_ops.tx = wcn36xx_msm_smd_send_and_wait;
>>> - wmsm.ctrl_ops.get_hw_mac = wcn36xx_msm_get_hw_mac;
>>> - wmsm.ctrl_ops.smsm_change_state = wcn36xx_msm_smsm_change_state;
>>> - wcnss_memory =
>>> - platform_get_resource_byname(pdev,
>>> - IORESOURCE_MEM,
>>> - "wcnss_mmio");
>>> - if (wcnss_memory == NULL) {
>>> - dev_err(&wmsm.core->dev,
>>> - "Failed to get wcnss wlan memory map.\n");
>>> - ret = -ENOMEM;
>>> - return ret;
>>> - }
>>> - memcpy(&res[0], wcnss_memory, sizeof(*wcnss_memory));
>>> -
>>> - tx_irq = platform_get_resource_byname(pdev,
>>> - IORESOURCE_IRQ,
>>> - "wcnss_wlantx_irq");
>>> - if (tx_irq == NULL) {
>>> - dev_err(&wmsm.core->dev, "Failed to get wcnss tx_irq");
>>> - ret = -ENOMEM;
>>> - return ret;
>>> - }
>>> - memcpy(&res[1], tx_irq, sizeof(*tx_irq));
>>> -
>>> - rx_irq = platform_get_resource_byname(pdev,
>>> - IORESOURCE_IRQ,
>>> - "wcnss_wlanrx_irq");
>>> - if (rx_irq == NULL) {
>>> - dev_err(&wmsm.core->dev, "Failed to get wcnss rx_irq");
>>> - ret = -ENOMEM;
>>> - return ret;
>>> + for (n = 0; n < ARRAY_SIZE(rnames); n++) {
>>> + r = platform_get_resource_byname(pdev, rtype[n], rnames[n]);
>>> + if (!r) {
>>> + dev_err(&wmsm.core->dev,
>>> + "Missing resource %s'\n", rnames[n]);
>>> + ret = -ENOMEM;
>>> + return ret;
>>> + }
>>> + res[n] = *r;
>>> }
>>> - memcpy(&res[2], rx_irq, sizeof(*rx_irq));
>>>
>>> - platform_device_add_resources(wmsm.core, res, ARRAY_SIZE(res));
>>> + platform_device_add_resources(wmsm.core, res, n);
>>>
>>> ret = platform_device_add_data(wmsm.core, &wmsm.ctrl_ops,
>>> sizeof(wmsm.ctrl_ops));
>>> @@ -319,10 +326,6 @@ static int wcn36xx_msm_remove(struct platform_device *pdev)
>>> return 0;
>>> }
>>>
>>> -static const struct of_device_id wcn36xx_msm_match_table[] = {
>>> - { .compatible = "qcom,wcn36xx" },
>>> - { }
>>> -};
>>> MODULE_DEVICE_TABLE(of, wcn36xx_msm_match_table);
>>>
>>> static struct platform_driver wcn36xx_msm_driver = {
>>>
>>
>>
>>
>> --
>> Best regards,
>> Eugene
--
Best regards,
Eugene
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