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Message-ID: <CAP05o4LE+9pWkePa3d3pMaoCi1g2Wo06-GJ5Ve4pKreMCajHNA@mail.gmail.com>
Date: Tue, 20 Sep 2011 20:05:44 +0530
From: "Munegowda, Keshava" <keshava_mgowda@...com>
To: "Cousson, Benoit" <b-cousson@...com>
Cc: "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Balbi, Felipe" <balbi@...com>, "Gadiyar, Anand" <gadiyar@...com>,
"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
"parthab@...ia.ti.com" <parthab@...ia.ti.com>,
"tony@...mide.com" <tony@...mide.com>,
"Hilman, Kevin" <khilman@...com>,
"paul@...an.com" <paul@...an.com>,
"johnstul@...ibm.com" <johnstul@...ibm.com>,
"Sripathy, Vishwanath" <vishwanath.bs@...com>
Subject: Re: [PATCH 1/5 v9] arm: omap: usb: ehci and ohci hwmod structures for omap4
On Tue, Sep 20, 2011 at 2:16 AM, Cousson, Benoit <b-cousson@...com> wrote:
> Keshava,
>
> I've just replied to your previous v8 version about the comments you didn't
> take into account.
> I just have one minor nit on that one I missed previously, plus a couple of
> clarifications.
>
> On 9/15/2011 3:22 PM, Munegowda, Keshava wrote:
>>
>> From: Benoit Cousson<b-cousson@...com>
>>
>> Following 4 hwmod structures are added:
>> UHH hwmod of usbhs with uhh base address and functional clock,
>> EHCI hwmod with irq and base address,
>> OHCI hwmod with irq and base address,
>> TLL hwmod of usbhs with the TLL base address and irq.
>>
>> Signed-off-by: Benoit Cousson<b-cousson@...com>
>> Signed-off-by: Keshava Munegowda<keshava_mgowda@...com>
>> ---
>> arch/arm/mach-omap2/omap_hwmod_44xx_data.c | 249
>> +++++++++++++++++++++++++++-
>> 1 files changed, 248 insertions(+), 1 deletions(-)
>>
>> diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
>> b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
>> index 6201422..f06efa6 100644
>> --- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
>> +++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
>> @@ -68,6 +68,10 @@ static struct omap_hwmod omap44xx_mmc2_hwmod;
>> static struct omap_hwmod omap44xx_mpu_hwmod;
>> static struct omap_hwmod omap44xx_mpu_private_hwmod;
>> static struct omap_hwmod omap44xx_usb_otg_hs_hwmod;
>> +static struct omap_hwmod omap44xx_usb_host_hs_hwmod;
>> +static struct omap_hwmod omap44xx_usbhs_ohci_hwmod;
>> +static struct omap_hwmod omap44xx_usbhs_ehci_hwmod;
>> +static struct omap_hwmod omap44xx_usb_tll_hs_hwmod;
>>
>> /*
>> * Interconnects omap_hwmod structures
>> @@ -5336,6 +5340,244 @@ static struct omap_hwmod omap44xx_wd_timer3_hwmod
>> = {
>> .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
>> };
>>
>> +/*
>> + * 'usb_host_hs' class
>> + * high-speed multi-port usb host controller
>> + */
>> +static struct omap_hwmod_ocp_if omap44xx_usb_host_hs__l3_main_2 = {
>> + .master =&omap44xx_usb_host_hs_hwmod,
>> + .slave =&omap44xx_l3_main_2_hwmod,
>> + .clk = "l3_div_ck",
>> + .user = OCP_USER_MPU | OCP_USER_SDMA,
>> +};
>> +
>> +static struct omap_hwmod_class_sysconfig omap44xx_usb_host_hs_sysc = {
>> + .rev_offs = 0x0000,
>> + .sysc_offs = 0x0010,
>> + .syss_offs = 0x0014,
>> + .sysc_flags = (SYSC_HAS_MIDLEMODE | SYSC_HAS_SIDLEMODE),
>> + .idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART |
>> + SIDLE_SMART_WKUP | MSTANDBY_FORCE | MSTANDBY_NO |
>> + MSTANDBY_SMART | MSTANDBY_SMART_WKUP),
>> + .sysc_fields =&omap_hwmod_sysc_type2,
>> +};
>> +
>> +static struct omap_hwmod_class omap44xx_usb_host_hs_hwmod_class = {
>> + .name = "usbhs_uhh",
>> + .sysc =&omap44xx_usb_host_hs_sysc,
>> +};
>> +
>> +static struct omap_hwmod_ocp_if *omap44xx_usb_host_hs_masters[] = {
>> + &omap44xx_usb_host_hs__l3_main_2,
>> +};
>> +
>> +static struct omap_hwmod_addr_space omap44xx_usb_host_hs_addrs[] = {
>> + {
>> + .name = "uhh",
>> + .pa_start = 0x4a064000,
>> + .pa_end = 0x4a0647ff,
>> + .flags = ADDR_TYPE_RT
>> + },
>> + {}
>> +};
>> +
>> +static struct omap_hwmod_ocp_if omap44xx_l4_cfg__usb_host_hs = {
>> + .master =&omap44xx_l4_cfg_hwmod,
>> + .slave =&omap44xx_usb_host_hs_hwmod,
>> + .clk = "l4_div_ck",
>> + .addr = omap44xx_usb_host_hs_addrs,
>> + .user = OCP_USER_MPU | OCP_USER_SDMA,
>> +};
>> +
>> +static struct omap_hwmod_ocp_if *omap44xx_usb_host_hs_slaves[] = {
>> + &omap44xx_l4_cfg__usb_host_hs,
>> +};
>> +
>> +static struct omap_hwmod omap44xx_usb_host_hs_hwmod = {
>> + .name = "usbhs_uhh",
>> + .class =&omap44xx_usb_host_hs_hwmod_class,
>> + .clkdm_name = "l3_init_clkdm",
>> + .main_clk = "usb_host_hs_fck",
>> + .prcm = {
>> + .omap4 = {
>> + .clkctrl_offs =
>> OMAP4_CM_L3INIT_USB_HOST_CLKCTRL_OFFSET,
>> + .context_offs =
>> OMAP4_RM_L3INIT_USB_HOST_CONTEXT_OFFSET,
>> + .modulemode = MODULEMODE_SWCTRL,
>> + },
>> + },
>> + .slaves = omap44xx_usb_host_hs_slaves,
>> + .slaves_cnt = ARRAY_SIZE(omap44xx_usb_host_hs_slaves),
>> + .masters = omap44xx_usb_host_hs_masters,
>> + .masters_cnt = ARRAY_SIZE(omap44xx_usb_host_hs_masters),
>> + .flags = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY,
>
> Why do you need these flags? These flags are reserved for non-standard
> behavior / HW bugs. I know that this IP is full of various bugs, but it will
> be nice to add some explanation in the changelog and a small comment here as
> well.
>
>> + .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
>> +};
>> +
>> +/* 'usbhs_ohci' class */
>> +static struct omap_hwmod_class omap44xx_usbhs_ohci_hwmod_class = {
>> + .name = "usbhs_ohci",
>> +};
>> +
>> +static struct omap_hwmod_irq_info omap44xx_usbhs_ohci_irqs[] = {
>> + { .name = "ohci-irq", .irq = 76 + OMAP44XX_IRQ_GIC_START },
>> + { .irq = -1 }
>> +};
>> +
>> +static struct omap_hwmod_addr_space omap44xx_usbhs_ohci_addrs[] = {
>> + {
>> + .name = "ohci",
>> + .pa_start = 0x4A064800,
>> + .pa_end = 0x4A064BFF,
>
> Nit: Please use lower case for hexa value. This is applicable for the whole
> patch.
>
>> + .flags = ADDR_MAP_ON_INIT
>> + },
>> + {}
>> +};
>> +
>> +static struct omap_hwmod_ocp_if omap44xx_l4_cfg__usbhs_ohci = {
>> + .master =&omap44xx_l4_cfg_hwmod,
>> + .slave =&omap44xx_usbhs_ohci_hwmod,
>> + .clk = "l4_div_ck",
>> + .addr = omap44xx_usbhs_ohci_addrs,
>> + .user = OCP_USER_MPU | OCP_USER_SDMA,
>> +};
>> +
>> +static struct omap_hwmod_ocp_if *omap44xx_usbhs_ohci_slaves[] = {
>> + &omap44xx_l4_cfg__usbhs_ohci,
>> +};
>> +
>> +static struct omap_hwmod_ocp_if *omap44xx_usbhs_ohci_masters[] = {
>> + &omap44xx_usb_host_hs__l3_main_2,
>> +};
>> +
>> +static struct omap_hwmod omap44xx_usbhs_ohci_hwmod = {
>> + .name = "usbhs_ohci",
>> + .class =&omap44xx_usbhs_ohci_hwmod_class,
>> + .clkdm_name = "l3_init_clkdm",
>> + .mpu_irqs = omap44xx_usbhs_ohci_irqs,
>> + .slaves = omap44xx_usbhs_ohci_slaves,
>> + .slaves_cnt = ARRAY_SIZE(omap44xx_usbhs_ohci_slaves),
>> + .masters = omap44xx_usbhs_ohci_masters,
>> + .masters_cnt = ARRAY_SIZE(omap44xx_usbhs_ohci_masters),
>> + .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
>> + .flags = HWMOD_INIT_NO_RESET | HWMOD_NO_IDLEST,
>
> Same question about these flags. Why do you need these? Please add some
> explanation.
>
> That comment is applicable for the remaining flags. These flags are probably
> all needed for that kind of IP, but the least you should do is to add some
> explanation.
>
> Thanks,
> Benoit
>
Hi Benoit
I have posted v10 covering all your comments which you have
mentioned in this mail
regards
keshava
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