[linux-2.6-block.git] / drivers / usb / host / ehci-orion.c

/*
 * drivers/usb/host/ehci-orion.c
 *
 * Tzachi Perelstein <tzachi@marvell.com>
 *
 * This file is licensed under  the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mbus.h>
#include <asm/plat-orion/ehci-orion.h>

#define rdl(off)	__raw_readl(hcd->regs + (off))
#define wrl(off, val)	__raw_writel((val), hcd->regs + (off))

#define USB_CMD			0x140
#define USB_MODE		0x1a8
#define USB_CAUSE		0x310
#define USB_MASK		0x314
#define USB_WINDOW_CTRL(i)	(0x320 + ((i) << 4))
#define USB_WINDOW_BASE(i)	(0x324 + ((i) << 4))
#define USB_IPG			0x360
#define USB_PHY_PWR_CTRL	0x400
#define USB_PHY_TX_CTRL		0x420
#define USB_PHY_RX_CTRL		0x430
#define USB_PHY_IVREF_CTRL	0x440
#define USB_PHY_TST_GRP_CTRL	0x450

/*
 * Implement Orion USB controller specification guidelines
 */
static void orion_usb_setup(struct usb_hcd *hcd)
{
	/*
	 * Clear interrupt cause and mask
	 */
	wrl(USB_CAUSE, 0);
	wrl(USB_MASK, 0);

	/*
	 * Reset controller
	 */
	wrl(USB_CMD, rdl(USB_CMD) | 0x2);
	while (rdl(USB_CMD) & 0x2);

	/*
	 * GL# USB-10: Set IPG for non start of frame packets
	 * Bits[14:8]=0xc
	 */
	wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);

	/*
	 * GL# USB-9: USB 2.0 Power Control
	 * BG_VSEL[7:6]=0x1
	 */
	wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);

	/*
	 * GL# USB-1: USB PHY Tx Control - force calibration to '8'
	 * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8
	 */
	wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);

	/*
	 * GL# USB-3 GL# USB-9: USB PHY Rx Control
	 * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0,
	 * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1
	 */
	wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);

	/*
	 * GL# USB-3 GL# USB-9: USB PHY IVREF Control
	 * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0
	 */
	wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);

	/*
	 * GL# USB-3 GL# USB-9: USB PHY Test Group Control
	 * REG_FIFO_SQ_RST[15]=0
	 */
	wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);

	/*
	 * Stop and reset controller
	 */
	wrl(USB_CMD, rdl(USB_CMD) & ~0x1);
	wrl(USB_CMD, rdl(USB_CMD) | 0x2);
	while (rdl(USB_CMD) & 0x2);

	/*
	 * GL# USB-5 Streaming disable REG_USB_MODE[4]=1
	 * TBD: This need to be done after each reset!
	 * GL# USB-4 Setup USB Host mode
	 */
	wrl(USB_MODE, 0x13);
}

static int ehci_orion_setup(struct usb_hcd *hcd)
{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int retval;

	retval = ehci_halt(ehci);
	if (retval)
		return retval;

	/*
	 * data structure init
	 */
	retval = ehci_init(hcd);
	if (retval)
		return retval;

	ehci_reset(ehci);
	ehci_port_power(ehci, 0);

	return retval;
}

static const struct hc_driver ehci_orion_hc_driver = {
	.description = hcd_name,
	.product_desc = "Marvell Orion EHCI",
	.hcd_priv_size = sizeof(struct ehci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq = ehci_irq,
	.flags = HCD_MEMORY | HCD_USB2,

	/*
	 * basic lifecycle operations
	 */
	.reset = ehci_orion_setup,
	.start = ehci_run,
#ifdef CONFIG_PM
	.suspend = ehci_bus_suspend,
	.resume = ehci_bus_resume,
#endif
	.stop = ehci_stop,
	.shutdown = ehci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue = ehci_urb_enqueue,
	.urb_dequeue = ehci_urb_dequeue,
	.endpoint_disable = ehci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number = ehci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data = ehci_hub_status_data,
	.hub_control = ehci_hub_control,
	.bus_suspend = ehci_bus_suspend,
	.bus_resume = ehci_bus_resume,
};

static void __init
ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
				struct mbus_dram_target_info *dram)
{
	int i;

	for (i = 0; i < 4; i++) {
		wrl(USB_WINDOW_CTRL(i), 0);
		wrl(USB_WINDOW_BASE(i), 0);
	}

	for (i = 0; i < dram->num_cs; i++) {
		struct mbus_dram_window *cs = dram->cs + i;

		wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
					(cs->mbus_attr << 8) |
					(dram->mbus_dram_target_id << 4) | 1);
		wrl(USB_WINDOW_BASE(i), cs->base);
	}
}

static int __init ehci_orion_drv_probe(struct platform_device *pdev)
{
	struct orion_ehci_data *pd = pdev->dev.platform_data;
	struct resource *res;
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	void __iomem *regs;
	int irq, err;

	if (usb_disabled())
		return -ENODEV;

	pr_debug("Initializing Orion-SoC USB Host Controller\n");

	irq = platform_get_irq(pdev, 0);
	if (irq <= 0) {
		dev_err(&pdev->dev,
			"Found HC with no IRQ. Check %s setup!\n",
			pdev->dev.bus_id);
		err = -ENODEV;
		goto err1;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev,
			"Found HC with no register addr. Check %s setup!\n",
			pdev->dev.bus_id);
		err = -ENODEV;
		goto err1;
	}

	if (!request_mem_region(res->start, res->end - res->start + 1,
				ehci_orion_hc_driver.description)) {
		dev_dbg(&pdev->dev, "controller already in use\n");
		err = -EBUSY;
		goto err1;
	}

	regs = ioremap(res->start, res->end - res->start + 1);
	if (regs == NULL) {
		dev_dbg(&pdev->dev, "error mapping memory\n");
		err = -EFAULT;
		goto err2;
	}

	hcd = usb_create_hcd(&ehci_orion_hc_driver,
			&pdev->dev, pdev->dev.bus_id);
	if (!hcd) {
		err = -ENOMEM;
		goto err3;
	}

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = res->end - res->start + 1;
	hcd->regs = regs;

	ehci = hcd_to_ehci(hcd);
	ehci->caps = hcd->regs + 0x100;
	ehci->regs = hcd->regs + 0x100 +
		HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
	ehci->is_tdi_rh_tt = 1;
	ehci->sbrn = 0x20;

	/*
	 * (Re-)program MBUS remapping windows if we are asked to.
	 */
	if (pd != NULL && pd->dram != NULL)
		ehci_orion_conf_mbus_windows(hcd, pd->dram);

	/*
	 * setup Orion USB controller
	 */
	orion_usb_setup(hcd);

	err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
	if (err)
		goto err4;

	return 0;

err4:
	usb_put_hcd(hcd);
err3:
	iounmap(regs);
err2:
	release_mem_region(res->start, res->end - res->start + 1);
err1:
	dev_err(&pdev->dev, "init %s fail, %d\n",
		pdev->dev.bus_id, err);

	return err;
}

static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);

	return 0;
}

MODULE_ALIAS("platform:orion-ehci");

static struct platform_driver ehci_orion_driver = {
	.probe		= ehci_orion_drv_probe,
	.remove		= __exit_p(ehci_orion_drv_remove),
	.shutdown	= usb_hcd_platform_shutdown,
	.driver.name	= "orion-ehci",
};
Commit	Line	Data
e96ffe2f TP	1	/*
	2	* drivers/usb/host/ehci-orion.c
	3	*
	4	* Tzachi Perelstein <tzachi@marvell.com>
	5	*
	6	* This file is licensed under the terms of the GNU General Public
	7	* License version 2. This program is licensed "as is" without any
	8	* warranty of any kind, whether express or implied.
	9	*/
	10
	11	#include <linux/kernel.h>
	12	#include <linux/module.h>
	13	#include <linux/platform_device.h>
92aecfa9	14	#include <linux/mbus.h>
705a7521	15	#include <asm/plat-orion/ehci-orion.h>
e96ffe2f TP	16
	17	#define rdl(off) __raw_readl(hcd->regs + (off))
	18	#define wrl(off, val) __raw_writel((val), hcd->regs + (off))
	19
e96ffe2f TP	20	#define USB_CMD 0x140
e96ffe2f TP	21	#define USB_MODE 0x1a8
92aecfa9 LB	22	#define USB_CAUSE 0x310
	23	#define USB_MASK 0x314
	24	#define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4))
	25	#define USB_WINDOW_BASE(i) (0x324 + ((i) << 4))
e96ffe2f TP	26	#define USB_IPG 0x360
	27	#define USB_PHY_PWR_CTRL 0x400
	28	#define USB_PHY_TX_CTRL 0x420
	29	#define USB_PHY_RX_CTRL 0x430
	30	#define USB_PHY_IVREF_CTRL 0x440
	31	#define USB_PHY_TST_GRP_CTRL 0x450
	32
	33	/*
	34	* Implement Orion USB controller specification guidelines
	35	*/
	36	static void orion_usb_setup(struct usb_hcd *hcd)
	37	{
	38	/*
	39	* Clear interrupt cause and mask
	40	*/
	41	wrl(USB_CAUSE, 0);
	42	wrl(USB_MASK, 0);
	43
	44	/*
	45	* Reset controller
	46	*/
	47	wrl(USB_CMD, rdl(USB_CMD) \| 0x2);
	48	while (rdl(USB_CMD) & 0x2);
	49
	50	/*
	51	* GL# USB-10: Set IPG for non start of frame packets
	52	* Bits[14:8]=0xc
	53	*/
	54	wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) \| 0xc00);
	55
	56	/*
	57	* GL# USB-9: USB 2.0 Power Control
	58	* BG_VSEL[7:6]=0x1
	59	*/
	60	wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)\| 0x40);
	61
	62	/*
	63	* GL# USB-1: USB PHY Tx Control - force calibration to '8'
	64	* TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8
	65	*/
	66	wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) \| 0x202040);
	67
	68	/*
	69	* GL# USB-3 GL# USB-9: USB PHY Rx Control
	70	* RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0,
	71	* CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1
	72	*/
	73	wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) \| 0xc0000010);
	74
	75	/*
	76	* GL# USB-3 GL# USB-9: USB PHY IVREF Control
	77	* PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0
	78	*/
	79	wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) \| 0x32);
	80
	81	/*
	82	* GL# USB-3 GL# USB-9: USB PHY Test Group Control
	83	* REG_FIFO_SQ_RST[15]=0
	84	*/
	85	wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);
	86
	87	/*
	88	* Stop and reset controller
	89	*/
90	wrl(USB_CMD, rdl(USB_CMD) & ~0x1);
91	wrl(USB_CMD, rdl(USB_CMD) \| 0x2);
92	while (rdl(USB_CMD) & 0x2);
93
94	/*
95	* GL# USB-5 Streaming disable REG_USB_MODE[4]=1
96	* TBD: This need to be done after each reset!
97	* GL# USB-4 Setup USB Host mode
98	*/
99	wrl(USB_MODE, 0x13);
100	}
101
102	static int ehci_orion_setup(struct usb_hcd *hcd)
103	{
104	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
105	int retval;
106
107	retval = ehci_halt(ehci);
108	if (retval)
109	return retval;
110
111	/*
112	* data structure init
113	*/
114	retval = ehci_init(hcd);
115	if (retval)
116	return retval;
117
118	ehci_reset(ehci);
119	ehci_port_power(ehci, 0);
120
121	return retval;
122	}
123
124	static const struct hc_driver ehci_orion_hc_driver = {
125	.description = hcd_name,
126	.product_desc = "Marvell Orion EHCI",
127	.hcd_priv_size = sizeof(struct ehci_hcd),
128
129	/*
130	* generic hardware linkage
131	*/
132	.irq = ehci_irq,
133	.flags = HCD_MEMORY \| HCD_USB2,
134
135	/*
136	* basic lifecycle operations
137	*/
138	.reset = ehci_orion_setup,
139	.start = ehci_run,
140	#ifdef CONFIG_PM
141	.suspend = ehci_bus_suspend,
142	.resume = ehci_bus_resume,
143	#endif
144	.stop = ehci_stop,
145	.shutdown = ehci_shutdown,
146
147	/*
148	* managing i/o requests and associated device resources
149	*/
150	.urb_enqueue = ehci_urb_enqueue,
151	.urb_dequeue = ehci_urb_dequeue,
152	.endpoint_disable = ehci_endpoint_disable,
153
154	/*
155	* scheduling support
156	*/
157	.get_frame_number = ehci_get_frame,
158
159	/*
160	* root hub support
161	*/
162	.hub_status_data = ehci_hub_status_data,
163	.hub_control = ehci_hub_control,
164	.bus_suspend = ehci_bus_suspend,
165	.bus_resume = ehci_bus_resume,
166	};
167
92aecfa9 LB	168	static void __init
	169	ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
	170	struct mbus_dram_target_info *dram)
	171	{
	172	int i;
	173
	174	for (i = 0; i < 4; i++) {
	175	wrl(USB_WINDOW_CTRL(i), 0);
	176	wrl(USB_WINDOW_BASE(i), 0);
	177	}
	178
	179	for (i = 0; i < dram->num_cs; i++) {
	180	struct mbus_dram_window *cs = dram->cs + i;
	181
	182	wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) \|
	183	(cs->mbus_attr << 8) \|
	184	(dram->mbus_dram_target_id << 4) \| 1);
	185	wrl(USB_WINDOW_BASE(i), cs->base);
	186	}
	187	}
	188
e96ffe2f TP	189	static int __init ehci_orion_drv_probe(struct platform_device *pdev)
e96ffe2f TP	190	{
92aecfa9	191	struct orion_ehci_data *pd = pdev->dev.platform_data;
e96ffe2f TP	192	struct resource *res;
	193	struct usb_hcd *hcd;
	194	struct ehci_hcd *ehci;
	195	void __iomem *regs;
	196	int irq, err;
	197
	198	if (usb_disabled())
	199	return -ENODEV;
	200
	201	pr_debug("Initializing Orion-SoC USB Host Controller\n");
	202
	203	irq = platform_get_irq(pdev, 0);
	204	if (irq <= 0) {
	205	dev_err(&pdev->dev,
	206	"Found HC with no IRQ. Check %s setup!\n",
	207	pdev->dev.bus_id);
	208	err = -ENODEV;
	209	goto err1;
	210	}
	211
	212	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	213	if (!res) {
	214	dev_err(&pdev->dev,
	215	"Found HC with no register addr. Check %s setup!\n",
	216	pdev->dev.bus_id);
	217	err = -ENODEV;
	218	goto err1;
	219	}
	220
	221	if (!request_mem_region(res->start, res->end - res->start + 1,
	222	ehci_orion_hc_driver.description)) {
	223	dev_dbg(&pdev->dev, "controller already in use\n");
	224	err = -EBUSY;
	225	goto err1;
	226	}
	227
	228	regs = ioremap(res->start, res->end - res->start + 1);
	229	if (regs == NULL) {
	230	dev_dbg(&pdev->dev, "error mapping memory\n");
	231	err = -EFAULT;
	232	goto err2;
	233	}
	234
	235	hcd = usb_create_hcd(&ehci_orion_hc_driver,
	236	&pdev->dev, pdev->dev.bus_id);
	237	if (!hcd) {
	238	err = -ENOMEM;
	239	goto err3;
	240	}
	241
	242	hcd->rsrc_start = res->start;
	243	hcd->rsrc_len = res->end - res->start + 1;
	244	hcd->regs = regs;
	245
	246	ehci = hcd_to_ehci(hcd);
	247	ehci->caps = hcd->regs + 0x100;
	248	ehci->regs = hcd->regs + 0x100 +
	249	HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
	250	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
	251	ehci->is_tdi_rh_tt = 1;
	252	ehci->sbrn = 0x20;
	253
92aecfa9 LB	254	/*
	255	* (Re-)program MBUS remapping windows if we are asked to.
	256	*/
	257	if (pd != NULL && pd->dram != NULL)
	258	ehci_orion_conf_mbus_windows(hcd, pd->dram);
	259
e96ffe2f TP	260	/*
	261	* setup Orion USB controller
	262	*/
	263	orion_usb_setup(hcd);
	264
	265	err = usb_add_hcd(hcd, irq, IRQF_SHARED \| IRQF_DISABLED);
	266	if (err)
	267	goto err4;
	268
	269	return 0;
	270
	271	err4:
	272	usb_put_hcd(hcd);
	273	err3:
	274	iounmap(regs);
	275	err2:
	276	release_mem_region(res->start, res->end - res->start + 1);
	277	err1:
	278	dev_err(&pdev->dev, "init %s fail, %d\n",
	279	pdev->dev.bus_id, err);
	280
	281	return err;
	282	}
	283
	284	static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
	285	{
	286	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	287
	288	usb_remove_hcd(hcd);
	289	iounmap(hcd->regs);
	290	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	291	usb_put_hcd(hcd);
	292
	293	return 0;
	294	}
	295
	296	MODULE_ALIAS("platform:orion-ehci");
	297
	298	static struct platform_driver ehci_orion_driver = {
	299	.probe = ehci_orion_drv_probe,
	300	.remove = __exit_p(ehci_orion_drv_remove),
	301	.shutdown = usb_hcd_platform_shutdown,
	302	.driver.name = "orion-ehci",
	303	};