source: mainline/uspace/drv/bus/usb/ehci/res.c@ c127e1c

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since c127e1c was 5b7ba8d, checked in by Jan Vesely <jano.vesely@…>, 14 years ago

ehci: Add few debug messages and fix typos.
  • Property mode set to 100644
File size: 10.0 KB
Line 
1/*
2 * Copyright (c) 2011 Jan Vesely
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/**
30 * @addtogroup drvusbehci
31 * @{
32 */
33/**
34 * @file
35 * PCI related functions needed by the EHCI driver.
36 */
37
38#include <errno.h>
39#include <str_error.h>
40#include <assert.h>
41#include <devman.h>
42#include <ddi.h>
43#include <usb/debug.h>
44#include <device/hw_res_parsed.h>
45#include <device/pci.h>
46
47#include "res.h"
48
49#define HCC_PARAMS_OFFSET 0x8
50#define HCC_PARAMS_EECP_MASK 0xff
51#define HCC_PARAMS_EECP_OFFSET 8
52
53#define CMD_OFFSET 0x0
54#define STS_OFFSET 0x4
55#define INT_OFFSET 0x8
56#define CFG_OFFSET 0x40
57
58#define USBCMD_RUN 1
59#define USBSTS_HALTED (1 << 12)
60
61#define USBLEGSUP_OFFSET 0
62#define USBLEGSUP_BIOS_CONTROL (1 << 16)
63#define USBLEGSUP_OS_CONTROL (1 << 24)
64#define USBLEGCTLSTS_OFFSET 4
65
66#define DEFAULT_WAIT 1000
67#define WAIT_STEP 10
68
69
70/** Get address of registers and IRQ for given device.
71 *
72 * @param[in] dev Device asking for the addresses.
73 * @param[out] mem_reg_address Base address of the memory range.
74 * @param[out] mem_reg_size Size of the memory range.
75 * @param[out] irq_no IRQ assigned to the device.
76 * @return Error code.
77 */
78int get_my_registers(const ddf_dev_t *dev,
79 uintptr_t *mem_reg_address, size_t *mem_reg_size, int *irq_no)
80{
81 assert(dev);
82
83 async_sess_t *parent_sess = devman_parent_device_connect(
84 EXCHANGE_SERIALIZE, dev->handle, IPC_FLAG_BLOCKING);
85 if (!parent_sess)
86 return ENOMEM;
87
88 hw_res_list_parsed_t hw_res;
89 hw_res_list_parsed_init(&hw_res);
90 const int ret = hw_res_get_list_parsed(parent_sess, &hw_res, 0);
91 async_hangup(parent_sess);
92 if (ret != EOK) {
93 return ret;
94 }
95
96 if (hw_res.irqs.count != 1 || hw_res.mem_ranges.count != 1) {
97 hw_res_list_parsed_clean(&hw_res);
98 return ENOENT;
99 }
100
101 if (mem_reg_address)
102 *mem_reg_address = hw_res.mem_ranges.ranges[0].address;
103 if (mem_reg_size)
104 *mem_reg_size = hw_res.mem_ranges.ranges[0].size;
105 if (irq_no)
106 *irq_no = hw_res.irqs.irqs[0];
107
108 hw_res_list_parsed_clean(&hw_res);
109 return EOK;
110}
111/*----------------------------------------------------------------------------*/
112/** Calls the PCI driver with a request to enable interrupts
113 *
114 * @param[in] device Device asking for interrupts
115 * @return Error code.
116 */
117int enable_interrupts(const ddf_dev_t *device)
118{
119 async_sess_t *parent_sess = devman_parent_device_connect(
120 EXCHANGE_SERIALIZE, device->handle, IPC_FLAG_BLOCKING);
121 if (!parent_sess)
122 return ENOMEM;
123
124 const bool enabled = hw_res_enable_interrupt(parent_sess);
125 async_hangup(parent_sess);
126
127 return enabled ? EOK : EIO;
128}
129/*----------------------------------------------------------------------------*/
130/** Implements BIOS hands-off routine as described in EHCI spec
131 *
132 * @param device EHCI device
133 * @param eecp Value of EHCI Extended Capabilities pointer.
134 * @return Error code.
135 */
136static int disable_extended_caps(const ddf_dev_t *device, unsigned eecp)
137{
138 /* nothing to do */
139 if (eecp == 0)
140 return EOK;
141
142 async_sess_t *parent_sess = devman_parent_device_connect(
143 EXCHANGE_SERIALIZE, device->handle, IPC_FLAG_BLOCKING);
144 if (!parent_sess)
145 return ENOMEM;
146
147#define CHECK_RET_HANGUP_RETURN(ret, message...) \
148 if (ret != EOK) { \
149 usb_log_error(message); \
150 async_hangup(parent_sess); \
151 return ret; \
152 } else (void)0
153
154 /* Read the first EEC. i.e. Legacy Support register */
155 uint32_t usblegsup;
156 int ret = pci_config_space_read_32(parent_sess,
157 eecp + USBLEGSUP_OFFSET, &usblegsup);
158 CHECK_RET_HANGUP_RETURN(ret,
159 "Failed to read USBLEGSUP: %s.\n", str_error(ret));
160 usb_log_debug("USBLEGSUP: %" PRIx32 ".\n", usblegsup);
161
162 /* Request control from firmware/BIOS by writing 1 to highest
163 * byte. (OS Control semaphore)*/
164 usb_log_debug("Requesting OS control.\n");
165 ret = pci_config_space_write_8(parent_sess,
166 eecp + USBLEGSUP_OFFSET + 3, 1);
167 CHECK_RET_HANGUP_RETURN(ret, "Failed to request OS EHCI control: %s.\n",
168 str_error(ret));
169
170 size_t wait = 0;
171 /* Wait for BIOS to release control. */
172 ret = pci_config_space_read_32(
173 parent_sess, eecp + USBLEGSUP_OFFSET, &usblegsup);
174 while ((wait < DEFAULT_WAIT) && (usblegsup & USBLEGSUP_BIOS_CONTROL)) {
175 async_usleep(WAIT_STEP);
176 ret = pci_config_space_read_32(parent_sess,
177 eecp + USBLEGSUP_OFFSET, &usblegsup);
178 wait += WAIT_STEP;
179 }
180
181 if ((usblegsup & USBLEGSUP_BIOS_CONTROL) == 0) {
182 usb_log_info("BIOS released control after %zu usec.\n", wait);
183 async_hangup(parent_sess);
184 return EOK;
185 }
186
187 /* BIOS failed to hand over control, this should not happen. */
188 usb_log_warning( "BIOS failed to release control after "
189 "%zu usecs, force it.\n", wait);
190 ret = pci_config_space_write_32(parent_sess,
191 eecp + USBLEGSUP_OFFSET, USBLEGSUP_OS_CONTROL);
192 CHECK_RET_HANGUP_RETURN(ret, "Failed to force OS control: "
193 "%s.\n", str_error(ret));
194 /*
195 * Check capability type here, value of 01h identifies the capability
196 * as Legacy Support. This extended capability requires one additional
197 * 32-bit register for control/status information and this register is
198 * located at offset EECP+04h
199 */
200 if ((usblegsup & 0xff) == 1) {
201 /* Read the second EEC Legacy Support and Control register */
202 uint32_t usblegctlsts;
203 ret = pci_config_space_read_32(parent_sess,
204 eecp + USBLEGCTLSTS_OFFSET, &usblegctlsts);
205 CHECK_RET_HANGUP_RETURN(ret, "Failed to get USBLEGCTLSTS: %s.\n",
206 str_error(ret));
207 usb_log_debug("USBLEGCTLSTS: %" PRIx32 ".\n", usblegctlsts);
208 /*
209 * Zero SMI enables in legacy control register.
210 * It should prevent pre-OS code from
211 * interfering. NOTE: Three upper bits are WC
212 */
213 ret = pci_config_space_write_32(parent_sess,
214 eecp + USBLEGCTLSTS_OFFSET, 0xe0000000);
215 CHECK_RET_HANGUP_RETURN(ret, "Failed(%d) zero USBLEGCTLSTS.\n", ret);
216 udelay(10);
217 ret = pci_config_space_read_32(parent_sess,
218 eecp + USBLEGCTLSTS_OFFSET, &usblegctlsts);
219 CHECK_RET_HANGUP_RETURN(ret, "Failed to get USBLEGCTLSTS 2: %s.\n",
220 str_error(ret));
221 usb_log_debug("Zeroed USBLEGCTLSTS: %" PRIx32 ".\n",
222 usblegctlsts);
223 }
224
225 /* Read again Legacy Support register */
226 ret = pci_config_space_read_32(parent_sess,
227 eecp + USBLEGSUP_OFFSET, &usblegsup);
228 CHECK_RET_HANGUP_RETURN(ret, "Failed to read USBLEGSUP: %s.\n",
229 str_error(ret));
230 usb_log_debug("USBLEGSUP: %" PRIx32 ".\n", usblegsup);
231 async_hangup(parent_sess);
232 return EOK;
233#undef CHECK_RET_HANGUP_RETURN
234}
235
236int disable_legacy(const ddf_dev_t *device, uintptr_t reg_base, size_t reg_size)
237{
238 assert(device);
239 usb_log_debug("Disabling EHCI legacy support.\n");
240
241#define CHECK_RET_RETURN(ret, message...) \
242 if (ret != EOK) { \
243 usb_log_error(message); \
244 return ret; \
245 } else (void)0
246
247 /* Map EHCI registers */
248 void *regs = NULL;
249 int ret = pio_enable((void*)reg_base, reg_size, &regs);
250 CHECK_RET_RETURN(ret, "Failed to map registers %p: %s.\n",
251 (void *) reg_base, str_error(ret));
252
253 usb_log_debug2("Registers mapped at: %p.\n", regs);
254
255 const uint32_t hcc_params =
256 *(uint32_t*)(regs + HCC_PARAMS_OFFSET);
257 usb_log_debug("Value of hcc params register: %x.\n", hcc_params);
258
259 /* Read value of EHCI Extended Capabilities Pointer
260 * position of EEC registers (points to PCI config space) */
261 const uint32_t eecp =
262 (hcc_params >> HCC_PARAMS_EECP_OFFSET) & HCC_PARAMS_EECP_MASK;
263 usb_log_debug("Value of EECP: %x.\n", eecp);
264
265 ret = disable_extended_caps(device, eecp);
266 CHECK_RET_RETURN(ret, "Failed to disable extended capabilities: %s.\n",
267 str_error(ret));
268
269#undef CHECK_RET_RETURN
270
271 /*
272 * TURN OFF EHCI FOR NOW, DRIVER WILL REINITIALIZE IT IF NEEDED
273 */
274
275 /* Get size of capability registers in memory space. */
276 const unsigned operation_offset = *(uint8_t*)regs;
277 usb_log_debug("USBCMD offset: %d.\n", operation_offset);
278
279 /* Zero USBCMD register. */
280 volatile uint32_t *usbcmd =
281 (uint32_t*)((uint8_t*)regs + operation_offset + CMD_OFFSET);
282 volatile uint32_t *usbsts =
283 (uint32_t*)((uint8_t*)regs + operation_offset + STS_OFFSET);
284 volatile uint32_t *usbconf =
285 (uint32_t*)((uint8_t*)regs + operation_offset + CFG_OFFSET);
286 volatile uint32_t *usbint =
287 (uint32_t*)((uint8_t*)regs + operation_offset + INT_OFFSET);
288 usb_log_debug("USBCMD value: %x.\n", *usbcmd);
289 if (*usbcmd & USBCMD_RUN) {
290 *usbsts = 0x3f; /* ack all interrupts */
291 *usbint = 0; /* disable all interrupts */
292 *usbconf = 0; /* release control of RH ports */
293
294 *usbcmd = 0;
295 /* Wait until hc is halted */
296 while ((*usbsts & USBSTS_HALTED) == 0);
297 usb_log_info("EHCI turned off.\n");
298 } else {
299 usb_log_info("EHCI was not running.\n");
300 }
301 usb_log_debug("Registers: \n"
302 "\t USBCMD(%p): %x(0x00080000 = at least 1ms between interrupts)\n"
303 "\t USBSTS(%p): %x(0x00001000 = HC halted)\n"
304 "\t USBINT(%p): %x(0x0 = no interrupts).\n"
305 "\t CONFIG(%p): %x(0x0 = ports controlled by companion hc).\n",
306 usbcmd, *usbcmd, usbsts, *usbsts, usbint, *usbint, usbconf,*usbconf);
307
308 return ret;
309}
310
311/**
312 * @}
313 */
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