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Message-ID: <CAP05o4J39MotDTOv-O2ahvWfxL-7jC-L3FGsNXbmDy8HNg=W3g@mail.gmail.com>
Date: Fri, 7 Oct 2011 14:51:52 +0530
From: "Munegowda, Keshava" <keshava_mgowda@...com>
To: Paul Walmsley <paul@...an.com>
Cc: linux-usb@...r.kernel.org, linux-omap@...r.kernel.org,
linux-kernel@...r.kernel.org, balbi@...com, khilman@...com,
b-cousson@...com, gadiyar@...com, sameo@...ux.intel.com,
parthab@...ia.ti.com, tony@...mide.com, johnstul@...ibm.com,
vishwanath.bs@...com
Subject: Re: [PATCH 1/5 v13] arm: omap: usb: ehci and ohci hwmod structures
for omap4
On Fri, Oct 7, 2011 at 2:36 PM, Paul Walmsley <paul@...an.com> wrote:
> Hi
>
> On Thu, 6 Oct 2011, Keshava Munegowda wrote:
>
>> From: Benoit Cousson <b-cousson@...com>
>>
>> Following 2 hwmod structures are added
>> 1. usb_host_hs
>> The hwmod of usbhs with uhh, ehci and ohci base addresses
>> functional clock and ehci, ohci irqs
>>
>> 2. usb_tll_hs
>> hwmod of usbhs with the TLL base address and irq.
>>
>> Signed-off-by: Benoit Cousson <b-cousson@...com>
>>
>> - rebased to kernel version 3.0
>> - Workarounds for hardware issues
>>
>> Signed-off-by: Keshava Munegowda <keshava_mgowda@...com>
>> Reviewed-by: Partha Basak <parthab@...ia.ti.com>
>
> A few minor issues in this patch have been fixed. Please be careful with
> whitespace and with multi-line comment style - see
> Documentation/CodingStyle for more information.
Thanks Paul;
yes, I can your changes in the patches.
so, you don't need v14 from me right? please confirm.
I am preparing/validating next version patches with OCPIF_SWSUP_IDLE removed.
Thanks for guiding me and helping on the finalizing the hwmod configurations.
regards
keshava
>
>
> - Paul
>
> From fdf7c66244af5ca5ba4cdc820f7644efb9f6c1bf Mon Sep 17 00:00:00 2001
> From: Benoit Cousson <b-cousson@...com>
> Date: Fri, 7 Oct 2011 02:40:51 -0600
> Subject: [PATCH] arm: omap: usb: ehci and ohci hwmod structures for omap4
>
> Following 2 hwmod structures are added
> 1. usb_host_hs
> The hwmod of usbhs with uhh, ehci and ohci base addresses
> functional clock and ehci, ohci irqs
>
> 2. usb_tll_hs
> hwmod of usbhs with the TLL base address and irq.
>
> Signed-off-by: Benoit Cousson <b-cousson@...com>
>
> - rebased to kernel version 3.0
> - Workarounds for hardware issues
>
> Signed-off-by: Keshava Munegowda <keshava_mgowda@...com>
> Reviewed-by: Partha Basak <parthab@...ia.ti.com>
> [paul@...an.com: fixed whitespace, fixed multi-line comment style]
> Signed-off-by: Paul Walmsley <paul@...an.com>
> ---
> arch/arm/mach-omap2/omap_hwmod_44xx_data.c | 206 +++++++++++++++++++++++++++-
> 1 files changed, 205 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 caaf409..6149407 100644
> --- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
> +++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
> @@ -68,6 +68,8 @@ 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_usb_tll_hs_hwmod;
>
> /*
> * Interconnects omap_hwmod structures
> @@ -5254,6 +5256,205 @@ static struct omap_hwmod omap44xx_wd_timer3_hwmod = {
> .slaves_cnt = ARRAY_SIZE(omap44xx_wd_timer3_slaves),
> };
>
> +/*
> + * '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 |
> + SYSC_HAS_SOFTRESET),
> + .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 = "usb_host_hs",
> + .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
> + },
> + {
> + .name = "ohci",
> + .pa_start = 0x4a064800,
> + .pa_end = 0x4a064bff,
> + },
> + {
> + .name = "ehci",
> + .pa_start = 0x4a064c00,
> + .pa_end = 0x4a064fff,
> + },
> + {}
> +};
> +
> +static struct omap_hwmod_irq_info omap44xx_usb_host_hs_irqs[] = {
> + { .name = "ohci-irq", .irq = 76 + OMAP44XX_IRQ_GIC_START },
> + { .name = "ehci-irq", .irq = 77 + OMAP44XX_IRQ_GIC_START },
> + { .irq = -1 }
> +};
> +
> +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 = "usb_host_hs",
> + .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,
> + },
> + },
> + .mpu_irqs = omap44xx_usb_host_hs_irqs,
> + .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),
> +/*
> + * Errata: USBHOST Configured In Smart-Idle Can Lead To a Deadlock
> + * id: i660
> + *
> + * Description:
> + * In the following configuration :
> + * - USBHOST module is set to smart-idle mode
> + * - PRCM asserts idle_req to the USBHOST module ( This typically happens
> + * when the system is going to a low power mode : all ports have been
> + * suspended, the master part of the USBHOST module has entered the
> + * standby state, and SW has cut the functional clocks.)
> + * - an USBHOST interrupt occurs before the module is able to answer
> + * idle_ack, typically a remote wakeup IRQ.
> + * Then the USB HOST module will enter a deadlock situation where it is no
> + * more accessible nor functional.
> + *
> + * Workaround:
> + * Don't use smart idle; use only force idle, hence HWMOD_SWSUP_SIDLE
> + */
> +
> +/*
> + * Errata: USB host EHCI may stall when entering smart-standby mode
> + * Id: i571
> + *
> + * Description:
> + * When the USBHOST module is set to smart-standby mode, and when it is
> + * ready to enter the standby state (i.e. all ports are suspended and
> + * all attached devices are in suspend mode), then it can wrongly assert
> + * the Mstandby signal too early while there are still some residual OCP
> + * transactions ongoing. If this condition occurs, the internal state
> + * machine may go to an undefined state and the USB link may be stuck
> + * upon the next resume.
> + *
> + * Workaround:
> + * Don't use smart standby; use only force standby,
> + * hence HWMOD_SWSUP_MSTANDBY
> + */
> +
> +/*
> + * During system boot; If the hwmod framework resets the module
> + * the module will have smart idle settings; which can lead to deadlock
> + * (above Errata Id:i660); so, dont reset the module during boot;
> + * Use HWMOD_INIT_NO_RESET.
> + */
> +
> + .flags = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY |
> + HWMOD_INIT_NO_RESET,
> +};
> +
> +/*
> + * 'usb_tll_hs' class
> + * usb_tll_hs module is the adapter on the usb_host_hs ports
> + */
> +static struct omap_hwmod_class_sysconfig omap44xx_usb_tll_hs_sysc = {
> + .rev_offs = 0x0000,
> + .sysc_offs = 0x0010,
> + .syss_offs = 0x0014,
> + .sysc_flags = (SYSC_HAS_CLOCKACTIVITY | SYSC_HAS_SIDLEMODE |
> + SYSC_HAS_ENAWAKEUP | SYSC_HAS_SOFTRESET |
> + SYSC_HAS_AUTOIDLE),
> + .idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART),
> + .sysc_fields = &omap_hwmod_sysc_type1,
> +};
> +
> +static struct omap_hwmod_class omap44xx_usb_tll_hs_hwmod_class = {
> + .name = "usb_tll_hs",
> + .sysc = &omap44xx_usb_tll_hs_sysc,
> +};
> +
> +static struct omap_hwmod_irq_info omap44xx_usb_tll_hs_irqs[] = {
> + { .name = "tll-irq", .irq = 78 + OMAP44XX_IRQ_GIC_START },
> + { .irq = -1 }
> +};
> +
> +static struct omap_hwmod_addr_space omap44xx_usb_tll_hs_addrs[] = {
> + {
> + .name = "tll",
> + .pa_start = 0x4a062000,
> + .pa_end = 0x4a063fff,
> + .flags = ADDR_TYPE_RT
> + },
> + {}
> +};
> +
> +static struct omap_hwmod_ocp_if omap44xx_l4_cfg__usb_tll_hs = {
> + .master = &omap44xx_l4_cfg_hwmod,
> + .slave = &omap44xx_usb_tll_hs_hwmod,
> + .addr = omap44xx_usb_tll_hs_addrs,
> + .user = OCP_USER_MPU | OCP_USER_SDMA,
> +};
> +
> +static struct omap_hwmod_ocp_if *omap44xx_usb_tll_hs_slaves[] = {
> + &omap44xx_l4_cfg__usb_tll_hs,
> +};
> +
> +static struct omap_hwmod omap44xx_usb_tll_hs_hwmod = {
> + .name = "usb_tll_hs",
> + .class = &omap44xx_usb_tll_hs_hwmod_class,
> + .clkdm_name = "l3_init_clkdm",
> + .main_clk = "usb_tll_hs_ick",
> + .prcm = {
> + .omap4 = {
> + .clkctrl_offs = OMAP4_CM_L3INIT_USB_TLL_CLKCTRL_OFFSET,
> + .context_offs = OMAP4_RM_L3INIT_USB_TLL_CONTEXT_OFFSET,
> + .modulemode = MODULEMODE_HWCTRL,
> + },
> + },
> + .mpu_irqs = omap44xx_usb_tll_hs_irqs,
> + .slaves = omap44xx_usb_tll_hs_slaves,
> + .slaves_cnt = ARRAY_SIZE(omap44xx_usb_tll_hs_slaves),
> +};
> +
> static __initdata struct omap_hwmod *omap44xx_hwmods[] = {
>
> /* dmm class */
> @@ -5393,13 +5594,16 @@ static __initdata struct omap_hwmod *omap44xx_hwmods[] = {
> &omap44xx_uart3_hwmod,
> &omap44xx_uart4_hwmod,
>
> + /* usb host class */
> + &omap44xx_usb_host_hs_hwmod,
> + &omap44xx_usb_tll_hs_hwmod,
> +
> /* usb_otg_hs class */
> &omap44xx_usb_otg_hs_hwmod,
>
> /* wd_timer class */
> &omap44xx_wd_timer2_hwmod,
> &omap44xx_wd_timer3_hwmod,
> -
> NULL,
> };
>
> --
> 1.7.6.3
>
>
--
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