USB: pxa168: Add onchip USB host controller support
- Add EHCI Host controller driver - Add wrapper that creates resources for host controller driver v2 - Call clk_put() after clk_disable() in probe function Signed-off-by: Tanmay Upadhyay <tanmay.upadhyay@einfochips.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tanmay Upadhyay
Greg Kroah-Hartman
parent
7a01f496c5
commit
3abd7f68b2
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@ -35,6 +35,13 @@ extern struct pxa_device_desc pxa168_device_fb;
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extern struct pxa_device_desc pxa168_device_keypad;
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extern struct pxa_device_desc pxa168_device_eth;
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struct pxa168_usb_pdata {
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/* If NULL, default phy init routine for PXA168 would be called */
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int (*phy_init)(void __iomem *usb_phy_reg_base);
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};
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/* pdata can be NULL */
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int __init pxa168_add_usb_host(struct pxa168_usb_pdata *pdata);
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static inline int pxa168_add_uart(int id)
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{
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struct pxa_device_desc *d = NULL;
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@ -25,6 +25,9 @@
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#include <mach/dma.h>
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#include <mach/devices.h>
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#include <mach/mfp.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <mach/pxa168.h>
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#include "common.h"
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#include "clock.h"
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@ -83,6 +86,7 @@ static APBC_CLK(keypad, PXA168_KPC, 0, 32000);
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static APMU_CLK(nand, NAND, 0x19b, 156000000);
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static APMU_CLK(lcd, LCD, 0x7f, 312000000);
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static APMU_CLK(eth, ETH, 0x09, 0);
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static APMU_CLK(usb, USB, 0x12, 0);
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/* device and clock bindings */
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static struct clk_lookup pxa168_clkregs[] = {
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@ -104,6 +108,7 @@ static struct clk_lookup pxa168_clkregs[] = {
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INIT_CLKREG(&clk_lcd, "pxa168-fb", NULL),
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INIT_CLKREG(&clk_keypad, "pxa27x-keypad", NULL),
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INIT_CLKREG(&clk_eth, "pxa168-eth", "MFUCLK"),
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INIT_CLKREG(&clk_usb, "pxa168-ehci", "PXA168-USBCLK"),
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};
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static int __init pxa168_init(void)
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@ -169,3 +174,44 @@ PXA168_DEVICE(ssp5, "pxa168-ssp", 4, SSP5, 0xd4021000, 0x40, 60, 61);
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PXA168_DEVICE(fb, "pxa168-fb", -1, LCD, 0xd420b000, 0x1c8);
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PXA168_DEVICE(keypad, "pxa27x-keypad", -1, KEYPAD, 0xd4012000, 0x4c);
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PXA168_DEVICE(eth, "pxa168-eth", -1, MFU, 0xc0800000, 0x0fff);
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struct resource pxa168_usb_host_resources[] = {
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/* USB Host conroller register base */
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[0] = {
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.start = 0xd4209000,
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.end = 0xd4209000 + 0x200,
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.flags = IORESOURCE_MEM,
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.name = "pxa168-usb-host",
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},
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/* USB PHY register base */
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[1] = {
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.start = 0xd4206000,
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.end = 0xd4206000 + 0xff,
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.flags = IORESOURCE_MEM,
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.name = "pxa168-usb-phy",
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},
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[2] = {
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.start = IRQ_PXA168_USB2,
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.end = IRQ_PXA168_USB2,
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.flags = IORESOURCE_IRQ,
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},
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};
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static u64 pxa168_usb_host_dmamask = DMA_BIT_MASK(32);
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struct platform_device pxa168_device_usb_host = {
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.name = "pxa168-ehci",
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.id = -1,
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.dev = {
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.dma_mask = &pxa168_usb_host_dmamask,
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.coherent_dma_mask = DMA_BIT_MASK(32),
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},
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.num_resources = ARRAY_SIZE(pxa168_usb_host_resources),
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.resource = pxa168_usb_host_resources,
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};
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int __init pxa168_add_usb_host(struct pxa168_usb_pdata *pdata)
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{
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pxa168_device_usb_host.dev.platform_data = pdata;
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return platform_device_register(&pxa168_device_usb_host);
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}
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@ -69,6 +69,7 @@ config USB_ARCH_HAS_EHCI
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default y if ARCH_MSM
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default y if MICROBLAZE
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default y if SPARC_LEON
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default y if ARCH_MMP
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default PCI
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# ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
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@ -578,3 +578,10 @@ config USB_OCTEON_OHCI
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config USB_OCTEON2_COMMON
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bool
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default y if USB_OCTEON_EHCI || USB_OCTEON_OHCI
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config USB_PXA168_EHCI
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bool "Marvell PXA168 on-chip EHCI HCD support"
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depends on USB_EHCI_HCD && ARCH_MMP
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help
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Enable support for Marvell PXA168 SoC's on-chip EHCI
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host controller
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@ -1291,6 +1291,11 @@ MODULE_LICENSE ("GPL");
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#define PLATFORM_DRIVER ehci_grlib_driver
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#endif
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#ifdef CONFIG_USB_PXA168_EHCI
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#include "ehci-pxa168.c"
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#define PLATFORM_DRIVER ehci_pxa168_driver
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#endif
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#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
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!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
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!defined(XILINX_OF_PLATFORM_DRIVER)
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@ -0,0 +1,363 @@
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/*
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* drivers/usb/host/ehci-pxa168.c
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*
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* Tanmay Upadhyay <tanmay.upadhyay@einfochips.com>
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*
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* Based on drivers/usb/host/ehci-orion.c
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <mach/pxa168.h>
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#define USB_PHY_CTRL_REG 0x4
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#define USB_PHY_PLL_REG 0x8
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#define USB_PHY_TX_REG 0xc
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#define FBDIV_SHIFT 4
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#define ICP_SHIFT 12
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#define ICP_15 2
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#define ICP_20 3
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#define ICP_25 4
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#define KVCO_SHIFT 15
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#define PLLCALI12_SHIFT 25
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#define CALI12_VDD 0
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#define CALI12_09 1
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#define CALI12_10 2
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#define CALI12_11 3
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#define PLLVDD12_SHIFT 27
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#define VDD12_VDD 0
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#define VDD12_10 1
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#define VDD12_11 2
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#define VDD12_12 3
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#define PLLVDD18_SHIFT 29
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#define VDD18_19 0
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#define VDD18_20 1
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#define VDD18_21 2
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#define VDD18_22 3
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#define PLL_READY (1 << 23)
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#define VCOCAL_START (1 << 21)
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#define REG_RCAL_START (1 << 12)
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struct pxa168_usb_drv_data {
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struct ehci_hcd ehci;
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struct clk *pxa168_usb_clk;
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struct resource *usb_phy_res;
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void __iomem *usb_phy_reg_base;
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};
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static int ehci_pxa168_setup(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int retval;
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ehci_reset(ehci);
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retval = ehci_halt(ehci);
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if (retval)
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return retval;
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/*
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* data structure init
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*/
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retval = ehci_init(hcd);
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if (retval)
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return retval;
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hcd->has_tt = 1;
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ehci_port_power(ehci, 0);
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return retval;
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}
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static const struct hc_driver ehci_pxa168_hc_driver = {
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.description = hcd_name,
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.product_desc = "Marvell PXA168 EHCI",
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.hcd_priv_size = sizeof(struct pxa168_usb_drv_data),
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/*
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* generic hardware linkage
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*/
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2,
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/*
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* basic lifecycle operations
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*/
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.reset = ehci_pxa168_setup,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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/*
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* scheduling support
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*/
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.get_frame_number = ehci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int pxa168_usb_phy_init(struct platform_device *pdev)
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{
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struct resource *res;
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void __iomem *usb_phy_reg_base;
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struct pxa168_usb_pdata *pdata;
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struct pxa168_usb_drv_data *drv_data;
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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unsigned long reg_val;
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int pll_retry_cont = 10000, err = 0;
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drv_data = (struct pxa168_usb_drv_data *)hcd->hcd_priv;
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pdata = (struct pxa168_usb_pdata *)pdev->dev.platform_data;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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if (!res) {
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dev_err(&pdev->dev,
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"Found HC with no PHY register addr. Check %s setup!\n",
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dev_name(&pdev->dev));
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return -ENODEV;
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}
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if (!request_mem_region(res->start, resource_size(res),
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ehci_pxa168_hc_driver.description)) {
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dev_dbg(&pdev->dev, "controller already in use\n");
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return -EBUSY;
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}
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usb_phy_reg_base = ioremap(res->start, resource_size(res));
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if (usb_phy_reg_base == NULL) {
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dev_dbg(&pdev->dev, "error mapping memory\n");
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err = -EFAULT;
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goto err1;
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}
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drv_data->usb_phy_reg_base = usb_phy_reg_base;
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drv_data->usb_phy_res = res;
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/* If someone wants to init USB phy in board specific way */
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if (pdata && pdata->phy_init)
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return pdata->phy_init(usb_phy_reg_base);
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/* Power up the PHY and PLL */
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writel(readl(usb_phy_reg_base + USB_PHY_CTRL_REG) | 0x3,
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usb_phy_reg_base + USB_PHY_CTRL_REG);
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/* Configure PHY PLL */
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reg_val = readl(usb_phy_reg_base + USB_PHY_PLL_REG) & ~(0x7e03ffff);
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reg_val |= (VDD18_22 << PLLVDD18_SHIFT | VDD12_12 << PLLVDD12_SHIFT |
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CALI12_11 << PLLCALI12_SHIFT | 3 << KVCO_SHIFT |
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ICP_15 << ICP_SHIFT | 0xee << FBDIV_SHIFT | 0xb);
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writel(reg_val, usb_phy_reg_base + USB_PHY_PLL_REG);
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/* Make sure PHY PLL is ready */
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while (!(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & PLL_READY)) {
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if (!(pll_retry_cont--)) {
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dev_dbg(&pdev->dev, "USB PHY PLL not ready\n");
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err = -EIO;
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goto err2;
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}
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}
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/* Toggle VCOCAL_START bit of U2PLL for PLL calibration */
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udelay(200);
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writel(readl(usb_phy_reg_base + USB_PHY_PLL_REG) | VCOCAL_START,
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usb_phy_reg_base + USB_PHY_PLL_REG);
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udelay(40);
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writel(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & ~VCOCAL_START,
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usb_phy_reg_base + USB_PHY_PLL_REG);
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/* Toggle REG_RCAL_START bit of U2PTX for impedance calibration */
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udelay(400);
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writel(readl(usb_phy_reg_base + USB_PHY_TX_REG) | REG_RCAL_START,
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usb_phy_reg_base + USB_PHY_TX_REG);
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udelay(40);
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writel(readl(usb_phy_reg_base + USB_PHY_TX_REG) & ~REG_RCAL_START,
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usb_phy_reg_base + USB_PHY_TX_REG);
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/* Make sure PHY PLL is ready again */
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pll_retry_cont = 0;
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while (!(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & PLL_READY)) {
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if (!(pll_retry_cont--)) {
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dev_dbg(&pdev->dev, "USB PHY PLL not ready\n");
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err = -EIO;
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goto err2;
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}
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}
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return 0;
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err2:
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iounmap(usb_phy_reg_base);
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err1:
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release_mem_region(res->start, resource_size(res));
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return err;
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}
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static int __devinit ehci_pxa168_drv_probe(struct platform_device *pdev)
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{
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struct resource *res;
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struct usb_hcd *hcd;
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struct ehci_hcd *ehci;
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struct pxa168_usb_drv_data *drv_data;
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void __iomem *regs;
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int irq, err = 0;
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if (usb_disabled())
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return -ENODEV;
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pr_debug("Initializing pxa168-SoC USB Host Controller\n");
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irq = platform_get_irq(pdev, 0);
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if (irq <= 0) {
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dev_err(&pdev->dev,
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"Found HC with no IRQ. Check %s setup!\n",
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dev_name(&pdev->dev));
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err = -ENODEV;
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goto err1;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev,
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"Found HC with no register addr. Check %s setup!\n",
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dev_name(&pdev->dev));
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err = -ENODEV;
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goto err1;
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}
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if (!request_mem_region(res->start, resource_size(res),
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ehci_pxa168_hc_driver.description)) {
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dev_dbg(&pdev->dev, "controller already in use\n");
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err = -EBUSY;
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goto err1;
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}
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regs = ioremap(res->start, resource_size(res));
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if (regs == NULL) {
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dev_dbg(&pdev->dev, "error mapping memory\n");
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err = -EFAULT;
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goto err2;
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}
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hcd = usb_create_hcd(&ehci_pxa168_hc_driver,
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&pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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err = -ENOMEM;
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goto err3;
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}
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drv_data = (struct pxa168_usb_drv_data *)hcd->hcd_priv;
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/* Enable USB clock */
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drv_data->pxa168_usb_clk = clk_get(&pdev->dev, "PXA168-USBCLK");
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if (IS_ERR(drv_data->pxa168_usb_clk)) {
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dev_err(&pdev->dev, "Couldn't get USB clock\n");
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err = PTR_ERR(drv_data->pxa168_usb_clk);
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goto err4;
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}
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clk_enable(drv_data->pxa168_usb_clk);
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err = pxa168_usb_phy_init(pdev);
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if (err) {
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dev_err(&pdev->dev, "USB PHY initialization failed\n");
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goto err5;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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hcd->regs = regs;
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ehci = hcd_to_ehci(hcd);
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ehci->caps = hcd->regs + 0x100;
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ehci->regs = hcd->regs + 0x100 +
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HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
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ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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hcd->has_tt = 1;
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ehci->sbrn = 0x20;
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err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
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if (err)
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goto err5;
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return 0;
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err5:
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clk_disable(drv_data->pxa168_usb_clk);
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clk_put(drv_data->pxa168_usb_clk);
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err4:
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usb_put_hcd(hcd);
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err3:
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iounmap(regs);
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err2:
|
||||
release_mem_region(res->start, resource_size(res));
|
||||
err1:
|
||||
dev_err(&pdev->dev, "init %s fail, %d\n",
|
||||
dev_name(&pdev->dev), err);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __exit ehci_pxa168_drv_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
||||
struct pxa168_usb_drv_data *drv_data =
|
||||
(struct pxa168_usb_drv_data *)hcd->hcd_priv;
|
||||
|
||||
usb_remove_hcd(hcd);
|
||||
|
||||
/* Power down PHY & PLL */
|
||||
writel(readl(drv_data->usb_phy_reg_base + USB_PHY_CTRL_REG) & (~0x3),
|
||||
drv_data->usb_phy_reg_base + USB_PHY_CTRL_REG);
|
||||
|
||||
clk_disable(drv_data->pxa168_usb_clk);
|
||||
clk_put(drv_data->pxa168_usb_clk);
|
||||
|
||||
iounmap(hcd->regs);
|
||||
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
||||
|
||||
iounmap(drv_data->usb_phy_reg_base);
|
||||
release_mem_region(drv_data->usb_phy_res->start,
|
||||
resource_size(drv_data->usb_phy_res));
|
||||
|
||||
usb_put_hcd(hcd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
MODULE_ALIAS("platform:pxa168-ehci");
|
||||
|
||||
static struct platform_driver ehci_pxa168_driver = {
|
||||
.probe = ehci_pxa168_drv_probe,
|
||||
.remove = __exit_p(ehci_pxa168_drv_remove),
|
||||
.shutdown = usb_hcd_platform_shutdown,
|
||||
.driver.name = "pxa168-ehci",
|
||||
};
|
||||
Loading…
Reference in New Issue