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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Pavel Rimsky |
2 | * Copyright (c) 2008 Pavel Rimsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup sparc64 |
29 | /** @addtogroup sparc64 |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** |
32 | /** |
33 | * @file |
33 | * @file |
34 | * @brief SGCN driver. |
34 | * @brief SGCN driver. |
35 | */ |
35 | */ |
36 | 36 | ||
- | 37 | #include <arch.h> |
|
37 | #include <arch/drivers/sgcn.h> |
38 | #include <arch/drivers/sgcn.h> |
38 | #include <arch/drivers/kbd.h> |
39 | #include <arch/drivers/kbd.h> |
39 | #include <genarch/ofw/ofw_tree.h> |
40 | #include <genarch/ofw/ofw_tree.h> |
40 | #include <debug.h> |
41 | #include <debug.h> |
41 | #include <string.h> |
42 | #include <string.h> |
42 | #include <print.h> |
43 | #include <print.h> |
43 | #include <mm/page.h> |
44 | #include <mm/page.h> |
44 | #include <ipc/irq.h> |
45 | #include <proc/thread.h> |
45 | #include <ddi/ddi.h> |
- | |
46 | #include <ddi/device.h> |
- | |
47 | #include <console/chardev.h> |
46 | #include <console/chardev.h> |
48 | #include <console/console.h> |
47 | #include <console/console.h> |
49 | #include <ddi/device.h> |
- | |
50 | #include <sysinfo/sysinfo.h> |
48 | #include <sysinfo/sysinfo.h> |
51 | #include <synch/spinlock.h> |
49 | #include <synch/spinlock.h> |
52 | 50 | ||
- | 51 | #define POLL_INTERVAL 10000 |
|
- | 52 | ||
53 | /* |
53 | /* |
54 | * Physical address at which the SBBC starts. This value has been obtained |
54 | * Physical address at which the SBBC starts. This value has been obtained |
55 | * by inspecting (using Simics) memory accesses made by OBP. It is valid |
55 | * by inspecting (using Simics) memory accesses made by OBP. It is valid |
56 | * for the Simics-simulated Serengeti machine. The author of this code is |
56 | * for the Simics-simulated Serengeti machine. The author of this code is |
57 | * not sure whether this value is valid generally. |
57 | * not sure whether this value is valid generally. |
58 | */ |
58 | */ |
59 | #define SBBC_START 0x63000000000 |
59 | #define SBBC_START 0x63000000000 |
60 | 60 | ||
61 | /* offset of SRAM within the SBBC memory */ |
61 | /* offset of SRAM within the SBBC memory */ |
62 | #define SBBC_SRAM_OFFSET 0x900000 |
62 | #define SBBC_SRAM_OFFSET 0x900000 |
63 | 63 | ||
64 | /* size (in bytes) of the physical memory area which will be mapped */ |
64 | /* size (in bytes) of the physical memory area which will be mapped */ |
65 | #define MAPPED_AREA_SIZE (128 * 1024) |
65 | #define MAPPED_AREA_SIZE (128 * 1024) |
66 | 66 | ||
67 | /* magic string contained at the beginning of SRAM */ |
67 | /* magic string contained at the beginning of SRAM */ |
68 | #define SRAM_TOC_MAGIC "TOCSRAM" |
68 | #define SRAM_TOC_MAGIC "TOCSRAM" |
69 | 69 | ||
70 | /* |
70 | /* |
71 | * Key into the SRAM table of contents which identifies the entry |
71 | * Key into the SRAM table of contents which identifies the entry |
72 | * describing the OBP console buffer. It is worth mentioning |
72 | * describing the OBP console buffer. It is worth mentioning |
73 | * that the OBP console buffer is not the only console buffer |
73 | * that the OBP console buffer is not the only console buffer |
74 | * which can be used. It is, however, used because when the kernel |
74 | * which can be used. It is, however, used because when the kernel |
75 | * is running, the OBP buffer is not used by OBP any more but OBP |
75 | * is running, the OBP buffer is not used by OBP any more but OBP |
76 | * has already made neccessary arangements so that the output will |
76 | * has already made neccessary arangements so that the output will |
77 | * be read from the OBP buffer and input will go to the OBP buffer. |
77 | * be read from the OBP buffer and input will go to the OBP buffer. |
78 | * Therefore HelenOS needs to make no such arrangements any more. |
78 | * Therefore HelenOS needs to make no such arrangements any more. |
79 | */ |
79 | */ |
80 | #define CONSOLE_KEY "OBPCONS" |
80 | #define CONSOLE_KEY "OBPCONS" |
81 | 81 | ||
82 | /* magic string contained at the beginning of the console buffer */ |
82 | /* magic string contained at the beginning of the console buffer */ |
83 | #define SGCN_BUFFER_MAGIC "CON" |
83 | #define SGCN_BUFFER_MAGIC "CON" |
84 | 84 | ||
85 | /** |
- | |
86 | * The driver is polling based, but in order to notify the userspace |
- | |
87 | * of a key being pressed, we need to supply the interface with some |
- | |
88 | * interrupt number. The interrupt number can be arbitrary as it it |
- | |
89 | * will never be used for identifying HW interrupts, but only in |
- | |
90 | * notifying the userspace. |
- | |
91 | */ |
- | |
92 | #define FICTIONAL_INR 1 |
- | |
93 | - | ||
94 | - | ||
95 | /* |
85 | /* |
96 | * Returns a pointer to the object of a given type which is placed at the given |
86 | * Returns a pointer to the object of a given type which is placed at the given |
97 | * offset from the SRAM beginning. |
87 | * offset from the SRAM beginning. |
98 | */ |
88 | */ |
99 | #define SRAM(type, offset) ((type *) (sram_begin + (offset))) |
89 | #define SRAM(type, offset) ((type *) (sram_begin + (offset))) |
100 | 90 | ||
101 | /* Returns a pointer to the SRAM table of contents. */ |
91 | /* Returns a pointer to the SRAM table of contents. */ |
102 | #define SRAM_TOC (SRAM(iosram_toc_t, 0)) |
92 | #define SRAM_TOC (SRAM(iosram_toc_t, 0)) |
103 | 93 | ||
104 | /* |
94 | /* |
105 | * Returns a pointer to the object of a given type which is placed at the given |
95 | * Returns a pointer to the object of a given type which is placed at the given |
106 | * offset from the console buffer beginning. |
96 | * offset from the console buffer beginning. |
107 | */ |
97 | */ |
108 | #define SGCN_BUFFER(type, offset) \ |
98 | #define SGCN_BUFFER(type, offset) \ |
109 | ((type *) (sgcn_buffer_begin + (offset))) |
99 | ((type *) (sgcn_buffer_begin + (offset))) |
110 | 100 | ||
111 | /** Returns a pointer to the console buffer header. */ |
101 | /** Returns a pointer to the console buffer header. */ |
112 | #define SGCN_BUFFER_HEADER (SGCN_BUFFER(sgcn_buffer_header_t, 0)) |
102 | #define SGCN_BUFFER_HEADER (SGCN_BUFFER(sgcn_buffer_header_t, 0)) |
113 | 103 | ||
114 | /** defined in drivers/kbd.c */ |
104 | /** defined in drivers/kbd.c */ |
115 | extern kbd_type_t kbd_type; |
105 | extern kbd_type_t kbd_type; |
116 | 106 | ||
117 | /** starting address of SRAM, will be set by the init_sram_begin function */ |
107 | /** starting address of SRAM, will be set by the init_sram_begin function */ |
118 | static uintptr_t sram_begin; |
108 | static uintptr_t sram_begin; |
119 | 109 | ||
120 | /** |
110 | /** |
121 | * starting address of the SGCN buffer, will be set by the |
111 | * starting address of the SGCN buffer, will be set by the |
122 | * init_sgcn_buffer_begin function |
112 | * init_sgcn_buffer_begin function |
123 | */ |
113 | */ |
124 | static uintptr_t sgcn_buffer_begin; |
114 | static uintptr_t sgcn_buffer_begin; |
125 | 115 | ||
126 | /** |
- | |
127 | * SGCN IRQ structure. So far used only for notifying the userspace of the |
116 | /* true iff the kernel driver should ignore pressed keys */ |
128 | * key being pressed, not for kernel being informed about keyboard interrupts. |
- | |
129 | */ |
- | |
130 | static irq_t sgcn_irq; |
117 | static bool kbd_disabled; |
131 | - | ||
132 | // TODO think of a way how to synchronize accesses to SGCN buffer between the kernel and the userspace |
- | |
133 | 118 | ||
134 | /* |
119 | /* |
135 | * Ensures that writing to the buffer and consequent update of the write pointer |
120 | * Ensures that writing to the buffer and consequent update of the write pointer |
136 | * are together one atomic operation. |
121 | * are together one atomic operation. |
137 | */ |
122 | */ |
138 | SPINLOCK_INITIALIZE(sgcn_output_lock); |
123 | SPINLOCK_INITIALIZE(sgcn_output_lock); |
139 | 124 | ||
140 | /* |
125 | /* |
141 | * Prevents the input buffer read/write pointers from getting to inconsistent |
126 | * Prevents the input buffer read/write pointers from getting to inconsistent |
142 | * state. |
127 | * state. |
143 | */ |
128 | */ |
144 | SPINLOCK_INITIALIZE(sgcn_input_lock); |
129 | SPINLOCK_INITIALIZE(sgcn_input_lock); |
145 | 130 | ||
146 | 131 | ||
147 | /* functions referenced from definitions of I/O operations structures */ |
132 | /* functions referenced from definitions of I/O operations structures */ |
148 | static void sgcn_noop(chardev_t *); |
133 | static void sgcn_noop(chardev_t *); |
149 | static void sgcn_putchar(chardev_t *, const char, bool); |
134 | static void sgcn_putchar(chardev_t *, const char, bool); |
150 | static char sgcn_key_read(chardev_t *); |
135 | static char sgcn_key_read(chardev_t *); |
151 | 136 | ||
152 | /** character device operations */ |
137 | /** character device operations */ |
153 | static chardev_operations_t sgcn_ops = { |
138 | static chardev_operations_t sgcn_ops = { |
154 | .suspend = sgcn_noop, |
139 | .suspend = sgcn_noop, |
155 | .resume = sgcn_noop, |
140 | .resume = sgcn_noop, |
156 | .read = sgcn_key_read, |
141 | .read = sgcn_key_read, |
157 | .write = sgcn_putchar |
142 | .write = sgcn_putchar |
158 | }; |
143 | }; |
159 | 144 | ||
160 | /** SGCN character device */ |
145 | /** SGCN character device */ |
161 | chardev_t sgcn_io; |
146 | chardev_t sgcn_io; |
162 | 147 | ||
163 | /** |
148 | /** |
164 | * Set some sysinfo values (SRAM address and SRAM size). |
149 | * Set some sysinfo values (SRAM address and SRAM size). |
165 | */ |
150 | */ |
166 | static void register_sram(uintptr_t sram_begin_physical) |
151 | static void register_sram(uintptr_t sram_begin_physical) |
167 | { |
152 | { |
168 | sysinfo_set_item_val("sram.area.size", NULL, MAPPED_AREA_SIZE); |
153 | sysinfo_set_item_val("sram.area.size", NULL, MAPPED_AREA_SIZE); |
169 | sysinfo_set_item_val("sram.address.physical", NULL, |
154 | sysinfo_set_item_val("sram.address.physical", NULL, |
170 | sram_begin_physical); |
155 | sram_begin_physical); |
171 | } |
156 | } |
172 | 157 | ||
173 | /** |
158 | /** |
174 | * Initializes the starting address of SRAM. |
159 | * Initializes the starting address of SRAM. |
175 | * |
160 | * |
176 | * The SRAM starts 0x900000 + C bytes behind the SBBC start in the |
161 | * The SRAM starts 0x900000 + C bytes behind the SBBC start in the |
177 | * physical memory, where C is the value read from the "iosram-toc" |
162 | * physical memory, where C is the value read from the "iosram-toc" |
178 | * property of the "/chosen" OBP node. The sram_begin variable will |
163 | * property of the "/chosen" OBP node. The sram_begin variable will |
179 | * be set to the virtual address which maps to the SRAM physical |
164 | * be set to the virtual address which maps to the SRAM physical |
180 | * address. |
165 | * address. |
181 | * |
166 | * |
182 | * It also registers the physical area of SRAM and sets some sysinfo |
167 | * It also registers the physical area of SRAM and sets some sysinfo |
183 | * values (SRAM address and SRAM size). |
168 | * values (SRAM address and SRAM size). |
184 | */ |
169 | */ |
185 | static void init_sram_begin(void) |
170 | static void init_sram_begin(void) |
186 | { |
171 | { |
187 | ofw_tree_node_t *chosen; |
172 | ofw_tree_node_t *chosen; |
188 | ofw_tree_property_t *iosram_toc; |
173 | ofw_tree_property_t *iosram_toc; |
189 | uintptr_t sram_begin_physical; |
174 | uintptr_t sram_begin_physical; |
190 | 175 | ||
191 | chosen = ofw_tree_lookup("/chosen"); |
176 | chosen = ofw_tree_lookup("/chosen"); |
192 | if (!chosen) |
177 | if (!chosen) |
193 | panic("Cannot find '/chosen'."); |
178 | panic("Cannot find '/chosen'."); |
194 | 179 | ||
195 | iosram_toc = ofw_tree_getprop(chosen, "iosram-toc"); |
180 | iosram_toc = ofw_tree_getprop(chosen, "iosram-toc"); |
196 | if (!iosram_toc) |
181 | if (!iosram_toc) |
197 | panic("Cannot find property 'iosram-toc'."); |
182 | panic("Cannot find property 'iosram-toc'."); |
198 | if (!iosram_toc->value) |
183 | if (!iosram_toc->value) |
199 | panic("Cannot find SRAM TOC."); |
184 | panic("Cannot find SRAM TOC."); |
200 | 185 | ||
201 | sram_begin_physical = SBBC_START + SBBC_SRAM_OFFSET |
186 | sram_begin_physical = SBBC_START + SBBC_SRAM_OFFSET |
202 | + *((uint32_t *) iosram_toc->value); |
187 | + *((uint32_t *) iosram_toc->value); |
203 | sram_begin = hw_map(sram_begin_physical, MAPPED_AREA_SIZE); |
188 | sram_begin = hw_map(sram_begin_physical, MAPPED_AREA_SIZE); |
204 | 189 | ||
205 | register_sram(sram_begin_physical); |
190 | register_sram(sram_begin_physical); |
206 | } |
191 | } |
207 | 192 | ||
208 | /** |
193 | /** |
209 | * Initializes the starting address of the SGCN buffer. |
194 | * Initializes the starting address of the SGCN buffer. |
210 | * |
195 | * |
211 | * The offset of the SGCN buffer within SRAM is obtained from the |
196 | * The offset of the SGCN buffer within SRAM is obtained from the |
212 | * SRAM table of contents. The table of contents contains |
197 | * SRAM table of contents. The table of contents contains |
213 | * information about several buffers, among which there is an OBP |
198 | * information about several buffers, among which there is an OBP |
214 | * console buffer - this one will be used as the SGCN buffer. |
199 | * console buffer - this one will be used as the SGCN buffer. |
215 | * |
200 | * |
216 | * This function also writes the offset of the SGCN buffer within SRAM |
201 | * This function also writes the offset of the SGCN buffer within SRAM |
217 | * under the sram.buffer.offset sysinfo key. |
202 | * under the sram.buffer.offset sysinfo key. |
218 | */ |
203 | */ |
219 | static void sgcn_buffer_begin_init(void) |
204 | static void sgcn_buffer_begin_init(void) |
220 | { |
205 | { |
221 | init_sram_begin(); |
206 | init_sram_begin(); |
222 | 207 | ||
223 | ASSERT(strcmp(SRAM_TOC->magic, SRAM_TOC_MAGIC) == 0); |
208 | ASSERT(strcmp(SRAM_TOC->magic, SRAM_TOC_MAGIC) == 0); |
224 | 209 | ||
225 | /* lookup TOC entry with the correct key */ |
210 | /* lookup TOC entry with the correct key */ |
226 | uint32_t i; |
211 | uint32_t i; |
227 | for (i = 0; i < MAX_TOC_ENTRIES; i++) { |
212 | for (i = 0; i < MAX_TOC_ENTRIES; i++) { |
228 | if (strcmp(SRAM_TOC->keys[i].key, CONSOLE_KEY) == 0) |
213 | if (strcmp(SRAM_TOC->keys[i].key, CONSOLE_KEY) == 0) |
229 | break; |
214 | break; |
230 | } |
215 | } |
231 | ASSERT(i < MAX_TOC_ENTRIES); |
216 | ASSERT(i < MAX_TOC_ENTRIES); |
232 | 217 | ||
233 | sgcn_buffer_begin = sram_begin + SRAM_TOC->keys[i].offset; |
218 | sgcn_buffer_begin = sram_begin + SRAM_TOC->keys[i].offset; |
234 | 219 | ||
235 | sysinfo_set_item_val("sram.buffer.offset", NULL, |
220 | sysinfo_set_item_val("sram.buffer.offset", NULL, |
236 | SRAM_TOC->keys[i].offset); |
221 | SRAM_TOC->keys[i].offset); |
237 | } |
222 | } |
238 | 223 | ||
239 | /** |
224 | /** |
240 | * Default suspend/resume operation for the input device. |
225 | * Default suspend/resume operation for the input device. |
241 | */ |
226 | */ |
242 | static void sgcn_noop(chardev_t *d) |
227 | static void sgcn_noop(chardev_t *d) |
243 | { |
228 | { |
244 | } |
229 | } |
245 | 230 | ||
246 | /** |
231 | /** |
247 | * Writes a single character to the SGCN (circular) output buffer |
232 | * Writes a single character to the SGCN (circular) output buffer |
248 | * and updates the output write pointer so that SGCN gets to know |
233 | * and updates the output write pointer so that SGCN gets to know |
249 | * that the character has been written. |
234 | * that the character has been written. |
250 | */ |
235 | */ |
251 | static void sgcn_do_putchar(const char c) |
236 | static void sgcn_do_putchar(const char c) |
252 | { |
237 | { |
253 | uint32_t begin = SGCN_BUFFER_HEADER->out_begin; |
238 | uint32_t begin = SGCN_BUFFER_HEADER->out_begin; |
254 | uint32_t end = SGCN_BUFFER_HEADER->out_end; |
239 | uint32_t end = SGCN_BUFFER_HEADER->out_end; |
255 | uint32_t size = end - begin; |
240 | uint32_t size = end - begin; |
256 | 241 | ||
257 | /* we need pointers to volatile variables */ |
242 | /* we need pointers to volatile variables */ |
258 | volatile char *buf_ptr = (volatile char *) |
243 | volatile char *buf_ptr = (volatile char *) |
259 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->out_wrptr); |
244 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->out_wrptr); |
260 | volatile uint32_t *out_wrptr_ptr = &(SGCN_BUFFER_HEADER->out_wrptr); |
245 | volatile uint32_t *out_wrptr_ptr = &(SGCN_BUFFER_HEADER->out_wrptr); |
261 | volatile uint32_t *out_rdptr_ptr = &(SGCN_BUFFER_HEADER->out_rdptr); |
246 | volatile uint32_t *out_rdptr_ptr = &(SGCN_BUFFER_HEADER->out_rdptr); |
262 | 247 | ||
263 | /* |
248 | /* |
264 | * Write the character and increment the write pointer modulo the |
249 | * Write the character and increment the write pointer modulo the |
265 | * output buffer size. Note that if we are to rewrite a character |
250 | * output buffer size. Note that if we are to rewrite a character |
266 | * which has not been read by the SGCN controller yet (i.e. the output |
251 | * which has not been read by the SGCN controller yet (i.e. the output |
267 | * buffer is full), we need to wait until the controller reads some more |
252 | * buffer is full), we need to wait until the controller reads some more |
268 | * characters. We wait actively, which means that all threads waiting |
253 | * characters. We wait actively, which means that all threads waiting |
269 | * for the lock are blocked. However, this situation is |
254 | * for the lock are blocked. However, this situation is |
270 | * 1) rare - the output buffer is big, so filling the whole |
255 | * 1) rare - the output buffer is big, so filling the whole |
271 | * output buffer is improbable |
256 | * output buffer is improbable |
272 | * 2) short-lasting - it will take the controller only a fraction |
257 | * 2) short-lasting - it will take the controller only a fraction |
273 | * of millisecond to pick the unread characters up |
258 | * of millisecond to pick the unread characters up |
274 | * 3) not serious - the blocked threads are those that print something |
259 | * 3) not serious - the blocked threads are those that print something |
275 | * to user console, which is not a time-critical operation |
260 | * to user console, which is not a time-critical operation |
276 | */ |
261 | */ |
277 | uint32_t new_wrptr = (((*out_wrptr_ptr) - begin + 1) % size) + begin; |
262 | uint32_t new_wrptr = (((*out_wrptr_ptr) - begin + 1) % size) + begin; |
278 | while (*out_rdptr_ptr == new_wrptr) |
263 | while (*out_rdptr_ptr == new_wrptr) |
279 | ; |
264 | ; |
280 | *buf_ptr = c; |
265 | *buf_ptr = c; |
281 | *out_wrptr_ptr = new_wrptr; |
266 | *out_wrptr_ptr = new_wrptr; |
282 | } |
267 | } |
283 | 268 | ||
284 | /** |
269 | /** |
285 | * SGCN output operation. Prints a single character to the SGCN. If the line |
270 | * SGCN output operation. Prints a single character to the SGCN. If the line |
286 | * feed character is written ('\n'), the carriage return character ('\r') is |
271 | * feed character is written ('\n'), the carriage return character ('\r') is |
287 | * written straight away. |
272 | * written straight away. |
288 | */ |
273 | */ |
289 | static void sgcn_putchar(struct chardev * cd, const char c, bool silent) |
274 | static void sgcn_putchar(struct chardev * cd, const char c, bool silent) |
290 | { |
275 | { |
291 | if (!silent) { |
276 | if (!silent) { |
292 | spinlock_lock(&sgcn_output_lock); |
277 | spinlock_lock(&sgcn_output_lock); |
293 | 278 | ||
294 | sgcn_do_putchar(c); |
279 | sgcn_do_putchar(c); |
295 | if (c == '\n') |
280 | if (c == '\n') |
296 | sgcn_do_putchar('\r'); |
281 | sgcn_do_putchar('\r'); |
297 | 282 | ||
298 | spinlock_unlock(&sgcn_output_lock); |
283 | spinlock_unlock(&sgcn_output_lock); |
299 | } |
284 | } |
300 | } |
285 | } |
301 | 286 | ||
302 | /** |
287 | /** |
303 | * Called when actively reading the character. Not implemented yet. |
288 | * Called when actively reading the character. Not implemented yet. |
304 | */ |
289 | */ |
305 | static char sgcn_key_read(chardev_t *d) |
290 | static char sgcn_key_read(chardev_t *d) |
306 | { |
291 | { |
307 | return (char) 0; |
292 | return (char) 0; |
308 | } |
293 | } |
309 | 294 | ||
310 | /** |
295 | /** |
311 | * The driver works in polled mode, so no interrupt should be handled by it. |
- | |
312 | */ |
- | |
313 | static irq_ownership_t sgcn_claim(irq_t *irq) |
- | |
314 | { |
- | |
315 | return IRQ_DECLINE; |
- | |
316 | } |
- | |
317 | - | ||
318 | /** |
- | |
319 | * The driver works in polled mode, so no interrupt should be handled by it. |
- | |
320 | */ |
- | |
321 | static void sgcn_irq_handler(irq_t *irq) |
- | |
322 | { |
- | |
323 | panic("Not yet implemented, SGCN works in polled mode."); |
- | |
324 | } |
- | |
325 | - | ||
326 | /** |
- | |
327 | * Grabs the input for kernel. |
296 | * Grabs the input for kernel. |
328 | */ |
297 | */ |
329 | void sgcn_grab(void) |
298 | void sgcn_grab(void) |
330 | { |
299 | { |
331 | ipl_t ipl = interrupts_disable(); |
- | |
332 | - | ||
333 | volatile uint32_t *in_wrptr_ptr = &(SGCN_BUFFER_HEADER->in_wrptr); |
- | |
334 | volatile uint32_t *in_rdptr_ptr = &(SGCN_BUFFER_HEADER->in_rdptr); |
- | |
335 | - | ||
336 | /* skip all the user typed before the grab and hasn't been processed */ |
- | |
337 | spinlock_lock(&sgcn_input_lock); |
- | |
338 | *in_rdptr_ptr = *in_wrptr_ptr; |
300 | kbd_disabled = true; |
339 | spinlock_unlock(&sgcn_input_lock); |
- | |
340 | - | ||
341 | spinlock_lock(&sgcn_irq.lock); |
- | |
342 | sgcn_irq.notif_cfg.notify = false; |
- | |
343 | spinlock_unlock(&sgcn_irq.lock); |
- | |
344 | - | ||
345 | interrupts_restore(ipl); |
- | |
346 | } |
301 | } |
347 | 302 | ||
348 | /** |
303 | /** |
349 | * Releases the input so that userspace can use it. |
304 | * Releases the input so that userspace can use it. |
350 | */ |
305 | */ |
351 | void sgcn_release(void) |
306 | void sgcn_release(void) |
352 | { |
307 | { |
353 | ipl_t ipl = interrupts_disable(); |
- | |
354 | spinlock_lock(&sgcn_irq.lock); |
- | |
355 | if (sgcn_irq.notif_cfg.answerbox) |
- | |
356 | sgcn_irq.notif_cfg.notify = true; |
308 | kbd_disabled = true; |
357 | spinlock_unlock(&sgcn_irq.lock); |
- | |
358 | interrupts_restore(ipl); |
- | |
359 | } |
309 | } |
360 | 310 | ||
361 | /** |
311 | /** |
362 | * Function regularly called by the keyboard polling thread. Finds out whether |
312 | * Function regularly called by the keyboard polling thread. Finds out whether |
363 | * there are some unread characters in the input queue. If so, it picks them up |
313 | * there are some unread characters in the input queue. If so, it picks them up |
364 | * and sends them to the upper layers of HelenOS. |
314 | * and sends them to the upper layers of HelenOS. |
365 | */ |
315 | */ |
366 | void sgcn_poll(void) |
316 | static void sgcn_poll() |
367 | { |
317 | { |
368 | uint32_t begin = SGCN_BUFFER_HEADER->in_begin; |
318 | uint32_t begin = SGCN_BUFFER_HEADER->in_begin; |
369 | uint32_t end = SGCN_BUFFER_HEADER->in_end; |
319 | uint32_t end = SGCN_BUFFER_HEADER->in_end; |
370 | uint32_t size = end - begin; |
320 | uint32_t size = end - begin; |
371 | 321 | ||
372 | spinlock_lock(&sgcn_input_lock); |
322 | spinlock_lock(&sgcn_input_lock); |
373 | 323 | ||
374 | ipl_t ipl = interrupts_disable(); |
324 | ipl_t ipl = interrupts_disable(); |
- | 325 | ||
- | 326 | if (kbd_disabled) { |
|
375 | spinlock_lock(&sgcn_irq.lock); |
327 | interrupts_restore(ipl); |
- | 328 | return; |
|
- | 329 | } |
|
376 | 330 | ||
377 | /* we need pointers to volatile variables */ |
331 | /* we need pointers to volatile variables */ |
378 | volatile char *buf_ptr = (volatile char *) |
332 | volatile char *buf_ptr = (volatile char *) |
379 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
333 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
380 | volatile uint32_t *in_wrptr_ptr = &(SGCN_BUFFER_HEADER->in_wrptr); |
334 | volatile uint32_t *in_wrptr_ptr = &(SGCN_BUFFER_HEADER->in_wrptr); |
381 | volatile uint32_t *in_rdptr_ptr = &(SGCN_BUFFER_HEADER->in_rdptr); |
335 | volatile uint32_t *in_rdptr_ptr = &(SGCN_BUFFER_HEADER->in_rdptr); |
382 | 336 | ||
383 | if (*in_rdptr_ptr != *in_wrptr_ptr) { |
- | |
384 | /* XXX: send notification to userspace */ |
- | |
385 | } |
- | |
386 | - | ||
387 | spinlock_unlock(&sgcn_irq.lock); |
- | |
388 | interrupts_restore(ipl); |
- | |
389 | - | ||
390 | while (*in_rdptr_ptr != *in_wrptr_ptr) { |
337 | while (*in_rdptr_ptr != *in_wrptr_ptr) { |
391 | 338 | ||
392 | buf_ptr = (volatile char *) |
339 | buf_ptr = (volatile char *) |
393 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
340 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
394 | char c = *buf_ptr; |
341 | char c = *buf_ptr; |
395 | *in_rdptr_ptr = (((*in_rdptr_ptr) - begin + 1) % size) + begin; |
342 | *in_rdptr_ptr = (((*in_rdptr_ptr) - begin + 1) % size) + begin; |
396 | 343 | ||
397 | if (c == '\r') { |
344 | if (c == '\r') { |
398 | c = '\n'; |
345 | c = '\n'; |
399 | } |
346 | } |
400 | chardev_push_character(&sgcn_io, c); |
347 | chardev_push_character(&sgcn_io, c); |
401 | } |
348 | } |
402 | 349 | ||
- | 350 | interrupts_restore(ipl); |
|
403 | spinlock_unlock(&sgcn_input_lock); |
351 | spinlock_unlock(&sgcn_input_lock); |
404 | } |
352 | } |
405 | 353 | ||
406 | /** |
354 | /** |
- | 355 | * Polling thread function. |
|
- | 356 | */ |
|
- | 357 | static void kkbdpoll(void *arg) { |
|
- | 358 | while (1) { |
|
- | 359 | if (!silent) { |
|
- | 360 | sgcn_poll(); |
|
- | 361 | } |
|
- | 362 | thread_usleep(POLL_INTERVAL); |
|
- | 363 | } |
|
- | 364 | } |
|
- | 365 | ||
- | 366 | /** |
|
407 | * A public function which initializes I/O from/to Serengeti console |
367 | * A public function which initializes I/O from/to Serengeti console |
408 | * and sets it as a default input/output. |
368 | * and sets it as a default input/output. |
409 | */ |
369 | */ |
410 | void sgcn_init(void) |
370 | void sgcn_init(void) |
411 | { |
371 | { |
412 | sgcn_buffer_begin_init(); |
372 | sgcn_buffer_begin_init(); |
413 | 373 | ||
414 | kbd_type = KBD_SGCN; |
374 | kbd_type = KBD_SGCN; |
415 | 375 | ||
416 | devno_t devno = device_assign_devno(); |
- | |
417 | irq_initialize(&sgcn_irq); |
- | |
418 | sgcn_irq.devno = devno; |
- | |
419 | sgcn_irq.inr = FICTIONAL_INR; |
- | |
420 | sgcn_irq.claim = sgcn_claim; |
- | |
421 | sgcn_irq.handler = sgcn_irq_handler; |
- | |
422 | irq_register(&sgcn_irq); |
- | |
423 | - | ||
424 | sysinfo_set_item_val("kbd", NULL, true); |
376 | sysinfo_set_item_val("kbd", NULL, true); |
425 | sysinfo_set_item_val("kbd.type", NULL, KBD_SGCN); |
377 | sysinfo_set_item_val("kbd.type", NULL, KBD_SGCN); |
426 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
- | |
427 | sysinfo_set_item_val("kbd.inr", NULL, FICTIONAL_INR); |
- | |
428 | sysinfo_set_item_val("fb.kind", NULL, 4); |
378 | sysinfo_set_item_val("fb.kind", NULL, 4); |
- | 379 | ||
- | 380 | thread_t *t = thread_create(kkbdpoll, NULL, TASK, 0, "kkbdpoll", true); |
|
- | 381 | if (!t) |
|
- | 382 | panic("Cannot create kkbdpoll."); |
|
- | 383 | thread_ready(t); |
|
429 | 384 | ||
430 | chardev_initialize("sgcn_io", &sgcn_io, &sgcn_ops); |
385 | chardev_initialize("sgcn_io", &sgcn_io, &sgcn_ops); |
431 | stdin = &sgcn_io; |
386 | stdin = &sgcn_io; |
432 | stdout = &sgcn_io; |
387 | stdout = &sgcn_io; |
433 | } |
388 | } |
434 | 389 | ||
435 | /** @} |
390 | /** @} |
436 | */ |
391 | */ |
437 | 392 |