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Date: Wed, 21 Jan 2015 16:32:37 +0200
From: "Ivan T. Ivanov" <iivanov@...sol.com>
To: Gilad Avidov <gavidov@...eaurora.org>
Cc: sdharia@...eaurora.org, mlocke@...eaurora.org,
linux-arm-msm@...r.kernel.org, gregkh@...uxfoundation.org,
linux-kernel@...r.kernel.org, galak@...eaurora.org,
agross@...eaurora.org
Subject: Re: [PATCH] spmi: pmic_arb: add support for hw version 2
Hi Gilad,
Just few comments.
On Mon, 2015-01-19 at 18:10 -0700, Gilad Avidov wrote:
> Qualcomm PMIC Arbiter version-2 changes from version-1 are:
>
> - Some diffrent register offsets.
> - New channel register space, one per PMIC peripheral (ppid).
> All tx tarffic uses these channels.
> - New observer register space. All rx trafic uses this space.
> - Diffrent command format for spmi command registers.
>
> Signed-off-by: Gilad Avidov <gavidov@...eaurora.org>
> Acked-by: Sagar Dharia <sdharia@...eaurora.org>
> ---
<snip>
>
> +struct pmic_arb_ver;
> +
Is there a better name for this structure. Ok it contain version
information, but.
> /**
> * spmi_pmic_arb_dev - SPMI PMIC Arbiter object
> *
> - * @base: address of the PMIC Arbiter core registers.
> + * @rd_base: on v1 "core", on v2 "observer" register base off DT.
> + * @rd_base: on v1 "core", on v2 "chnls" register base off DT.
s/rd/wr/
> * @intr: address of the SPMI interrupt control registers.
> * @cnfg: address of the PMIC Arbiter configuration registers.
> * @lock: lock to synchronize accesses.
> - * @channel: which channel to use for accesses.
> + * @channel: which ee channel to use for accesses.
> * @irq: PMIC ARB interrupt.
> * @ee: the current Execution Environment
> * @min_apid: minimum APID (used for bounding IRQ search)
> @@ -114,9 +121,11 @@ enum pmic_arb_cmd_op_code {
> * @domain: irq domain object for PMIC IRQ domain
> * @spmic: SPMI controller object
> * @apid_to_ppid: cached mapping from APID to PPID
> + * @ppid_to_chan cached mapping from APID to channel number, v2 only.
> */
> struct spmi_pmic_arb_dev {
> - void __iomem*base;
> + void __iomem*rd_base;
> + void __iomem*wr_base;
> void __iomem*intr;
> void __iomem*cnfg;
> raw_spinlock_tlock;
> @@ -129,17 +138,61 @@ struct spmi_pmic_arb_dev {
> struct irq_domain*domain;
> struct spmi_controller*spmic;
> u16 apid_to_ppid[256];
> + const struct pmic_arb_ver *ver;
> + u8 *ppid_to_chan;
> +};
> +
> +/**
> + * pmic_arb_ver: version dependent functionality and values.
> + *
> + * @non_data_cmd: on v1 issues an spmi non-data command.
> + * on v2 no HW support, returns -EOPNOTSUPP.
> + * @offset: on v1 offset of per-ee channel.
> + * on v2 offset of per-ee and per-ppid channel.
> + * @fmt_cmd: formats a GENI/SPMI command.
> + * @owner_acc_status: on v1 offset of PMIC_ARB_SPMI_PIC_OWNERm_ACC_STATUSn
> + * on v2 offset of SPMI_PIC_OWNERm_ACC_STATUSn.
> + * @acc_enable: on v1 offset of PMIC_ARB_SPMI_PIC_ACC_ENABLEn
> + * on v2 offset of SPMI_PIC_ACC_ENABLEn.
> + * @irq_status: on v1 offset of PMIC_ARB_SPMI_PIC_IRQ_STATUSn
> + * on v2 offset of SPMI_PIC_IRQ_STATUSn.
> + * @irq_clear: on v1 offset of PMIC_ARB_SPMI_PIC_IRQ_CLEARn
> + * on v2 offset of SPMI_PIC_IRQ_CLEARn.
> + * @geni_ctrl: PMIC_ARB_GENI_CTRL offset.
> + * @geni_status: PMIC_ARB_GENI_STATUS offset.
> + * @protocol_irq_status: PMIC_ARB_PROTOCOL_IRQ_STATUS offset.
> + */
> +struct pmic_arb_ver {
> + int (*non_data_cmd)(struct spmi_controller *ctrl, u8 opc, u8 sid);
> + /* SPMI commands (including data) related functionality */
> + off_t (*offset)(struct spmi_pmic_arb_dev *dev, u8 sid, u16 addr);
> + u32 (*fmt_cmd)(u8 opc, u8 sid, u16 addr, u8 bc);
> + /* Interrupts related functionality (offset of PIC registers) */
> + off_t (*owner_acc_status)(u8 m, u8 n);
> + off_t (*acc_enable)(u8 n);
> + off_t (*irq_status)(u8 n);
> + off_t (*irq_clear)(u8 n);
> + /* Register offsets */
> + off_t geni_ctrl;
> + off_t geni_status;
> + off_t protocol_irq_status;
> };
>
>
<snip>
> +
> +/* Non-data command */
> +static int pmic_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
> +{
> + struct spmi_pmic_arb_dev *pmic_arb = spmi_controller_get_drvdata(ctrl);
> +
> + pr_debug("op:0x%x sid:%d\n", opc, sid);
>
Please use dev_dbg.
> +static const struct pmic_arb_ver pmic_arb_v1 = {
> + .non_data_cmd= pmic_arb_non_data_cmd_v1,
Missing space before =
> + .offset = pmic_arb_offset_v1,
> + .fmt_cmd = pmic_arb_fmt_cmd_v1,
Bad indentation... and bellow
> + .owner_acc_status= pmic_arb_owner_acc_status_v1,
> + .acc_enable= pmic_arb_acc_enable_v1,
> + .irq_status= pmic_arb_irq_status_v1,
> + .irq_clear= pmic_arb_irq_clear_v1,
> + .geni_ctrl= 0x24,
> + .geni_status= 0x28,
> + .protocol_irq_status= (0x700 + 0x820),
> +};
> +
> +static const struct pmic_arb_ver pmic_arb_v2 = {
> + .non_data_cmd= pmic_arb_non_data_cmd_v2,
> + .offset = pmic_arb_offset_v2,
> + .fmt_cmd = pmic_arb_fmt_cmd_v2,
> + .owner_acc_status= pmic_arb_owner_acc_status_v2,
> + .acc_enable= pmic_arb_acc_enable_v2,
> + .irq_status= pmic_arb_irq_status_v2,
> + .irq_clear= pmic_arb_irq_clear_v2,
> + .geni_ctrl= 0x28,
> + .geni_status= 0x2C,
> + .protocol_irq_status= (0x700 + 0x900),
> +};
> +
> static const struct irq_domain_ops pmic_arb_irq_domain_ops = {
> .map = qpnpint_irq_domain_map,
> .xlate = qpnpint_irq_domain_dt_translate,
> @@ -634,9 +798,11 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
> struct spmi_pmic_arb_dev *pa;
> struct spmi_controller *ctrl;
> struct resource *res;
> - u32 channel, ee;
> + u32 channel, ee, hw_ver;
> int err, i;
>
> + pr_err("PMIC Arbiter\n");
> +
leftover from debug?
> ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*pa));
> if (!ctrl)
> return -ENOMEM;
> @@ -645,12 +811,64 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
> pa->spmic = ctrl;
>
> res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
> - pa->base = devm_ioremap_resource(&ctrl->dev, res);
> - if (IS_ERR(pa->base)) {
> - err = PTR_ERR(pa->base);
> + pa->rd_base = devm_ioremap_resource(&ctrl->dev, res);
> + if (IS_ERR(pa->rd_base)) {
> + err = PTR_ERR(pa->rd_base);
> goto err_put_ctrl;
> }
>
> + hw_ver = readl_relaxed(pa->rd_base + PMIC_ARB_VERSION);
> +
> + if (hw_ver < PMIC_ARB_VERSION_V2_MIN) {
> + pa->ver= &pmic_arb_v1;
> + dev_dbg(&ctrl->dev, "PMIC Arb Version-1 (0x%x)\n", hw_ver);
> + pa->wr_base = pa->rd_base;
> + } else {
> + u8 chan;
> + u16 ppid;
> + u32 regval;
> +
> + pa->ver = &pmic_arb_v2;
> + dev_dbg(&ctrl->dev, "PMIC Arb Version-2 (0x%x)\n", hw_ver);
Do we really need two almost the same dev_dbg's?
> +
> + pa->ppid_to_chan = devm_kzalloc(&ctrl->dev,
> + PPID_TO_CHAN_TABLE_SZ, GFP_KERNEL);
> + if (!pa->ppid_to_chan) {
> + dev_err(&ctrl->dev,
> + "faild allocation of ppid_to_chan table\n");
> + err = -ENOMEM;
> + goto err_put_ctrl;
> + }
> + /*
> + * PMIC_ARB_REG_CHNL is a table in HW mapping channel to ppid.
> + * ppid_to_chan is an inverted cache of that table.
> + */
> + for (chan = 0; chan < PMIC_ARB_MAX_CHNL; ++chan) {
> + regval = readl_relaxed(pa->rd_base +
> +
> PMIC_ARB_REG_CHNL(chan));
> + if (!regval)
> + continue;
> +
> + ppid = (regval >> 8) & 0xFFF;
> + pa->ppid_to_chan[ppid] = chan;
> + }
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> + "obsrvr");
> + pa->rd_base = devm_ioremap_resource(&ctrl->dev, res);
> + if (IS_ERR(pa->rd_base)) {
> + err = PTR_ERR(pa->rd_base);
> + goto err_put_ctrl;
> + }
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> + "chnls");
it looks like
pa->wr_base = devm_ioremap_resource(&ctrl->dev, res);
is missing?
> + if (IS_ERR(pa->wr_base)) {
> + err = PTR_ERR(pa->wr_base);
> + goto err_put_ctrl;
> + }
> + }
> +
>
Thanks Ivan.
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