Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Driver for the 98626/98644/internal serial interface on hp300/hp400 | |
3 | * (based on the National Semiconductor INS8250/NS16550AF/WD16C552 UARTs) | |
4 | * | |
5 | * Ported from 2.2 and modified to use the normal 8250 driver | |
6 | * by Kars de Jong <jongk@linux-m68k.org>, May 2004. | |
7 | */ | |
8 | #include <linux/module.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/string.h> | |
11 | #include <linux/kernel.h> | |
1da177e4 | 12 | #include <linux/serial.h> |
1da177e4 | 13 | #include <linux/serial_core.h> |
b187f180 | 14 | #include <linux/serial_8250.h> |
1da177e4 LT |
15 | #include <linux/delay.h> |
16 | #include <linux/dio.h> | |
17 | #include <linux/console.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
1da177e4 LT |
19 | #include <asm/io.h> |
20 | ||
2b49abac RK |
21 | #include "8250.h" |
22 | ||
1da177e4 LT |
23 | #if !defined(CONFIG_HPDCA) && !defined(CONFIG_HPAPCI) |
24 | #warning CONFIG_8250 defined but neither CONFIG_HPDCA nor CONFIG_HPAPCI defined, are you sure? | |
25 | #endif | |
26 | ||
27 | #ifdef CONFIG_HPAPCI | |
28 | struct hp300_port | |
29 | { | |
30 | struct hp300_port *next; /* next port */ | |
31 | int line; /* line (tty) number */ | |
32 | }; | |
33 | ||
34 | static struct hp300_port *hp300_ports; | |
35 | #endif | |
36 | ||
37 | #ifdef CONFIG_HPDCA | |
38 | ||
39 | static int __devinit hpdca_init_one(struct dio_dev *d, | |
0fe1c137 | 40 | const struct dio_device_id *ent); |
1da177e4 LT |
41 | static void __devexit hpdca_remove_one(struct dio_dev *d); |
42 | ||
43 | static struct dio_device_id hpdca_dio_tbl[] = { | |
44 | { DIO_ID_DCA0 }, | |
45 | { DIO_ID_DCA0REM }, | |
46 | { DIO_ID_DCA1 }, | |
47 | { DIO_ID_DCA1REM }, | |
48 | { 0 } | |
49 | }; | |
50 | ||
51 | static struct dio_driver hpdca_driver = { | |
52 | .name = "hpdca", | |
53 | .id_table = hpdca_dio_tbl, | |
54 | .probe = hpdca_init_one, | |
55 | .remove = __devexit_p(hpdca_remove_one), | |
56 | }; | |
57 | ||
58 | #endif | |
59 | ||
e51c01b0 BH |
60 | static unsigned int num_ports; |
61 | ||
1da177e4 LT |
62 | extern int hp300_uart_scode; |
63 | ||
64 | /* Offset to UART registers from base of DCA */ | |
65 | #define UART_OFFSET 17 | |
66 | ||
67 | #define DCA_ID 0x01 /* ID (read), reset (write) */ | |
68 | #define DCA_IC 0x03 /* Interrupt control */ | |
69 | ||
70 | /* Interrupt control */ | |
71 | #define DCA_IC_IE 0x80 /* Master interrupt enable */ | |
72 | ||
73 | #define HPDCA_BAUD_BASE 153600 | |
74 | ||
75 | /* Base address of the Frodo part */ | |
76 | #define FRODO_BASE (0x41c000) | |
77 | ||
78 | /* | |
79 | * Where we find the 8250-like APCI ports, and how far apart they are. | |
80 | */ | |
81 | #define FRODO_APCIBASE 0x0 | |
82 | #define FRODO_APCISPACE 0x20 | |
83 | #define FRODO_APCI_OFFSET(x) (FRODO_APCIBASE + ((x) * FRODO_APCISPACE)) | |
84 | ||
85 | #define HPAPCI_BAUD_BASE 500400 | |
86 | ||
87 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
88 | /* | |
0fe1c137 | 89 | * Parse the bootinfo to find descriptions for headless console and |
1da177e4 LT |
90 | * debug serial ports and register them with the 8250 driver. |
91 | * This function should be called before serial_console_init() is called | |
92 | * to make sure the serial console will be available for use. IA-64 kernel | |
93 | * calls this function from setup_arch() after the EFI and ACPI tables have | |
94 | * been parsed. | |
95 | */ | |
96 | int __init hp300_setup_serial_console(void) | |
97 | { | |
98 | int scode; | |
99 | struct uart_port port; | |
100 | ||
101 | memset(&port, 0, sizeof(port)); | |
102 | ||
103 | if (hp300_uart_scode < 0 || hp300_uart_scode > DIO_SCMAX) | |
104 | return 0; | |
105 | ||
106 | if (DIO_SCINHOLE(hp300_uart_scode)) | |
107 | return 0; | |
108 | ||
109 | scode = hp300_uart_scode; | |
110 | ||
111 | /* Memory mapped I/O */ | |
112 | port.iotype = UPIO_MEM; | |
113 | port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF; | |
114 | port.type = PORT_UNKNOWN; | |
115 | ||
116 | /* Check for APCI console */ | |
117 | if (scode == 256) { | |
118 | #ifdef CONFIG_HPAPCI | |
119 | printk(KERN_INFO "Serial console is HP APCI 1\n"); | |
120 | ||
121 | port.uartclk = HPAPCI_BAUD_BASE * 16; | |
122 | port.mapbase = (FRODO_BASE + FRODO_APCI_OFFSET(1)); | |
123 | port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE); | |
124 | port.regshift = 2; | |
125 | add_preferred_console("ttyS", port.line, "9600n8"); | |
126 | #else | |
127 | printk(KERN_WARNING "Serial console is APCI but support is disabled (CONFIG_HPAPCI)!\n"); | |
128 | return 0; | |
129 | #endif | |
0fe1c137 | 130 | } else { |
1da177e4 LT |
131 | #ifdef CONFIG_HPDCA |
132 | unsigned long pa = dio_scodetophysaddr(scode); | |
0fe1c137 | 133 | if (!pa) |
1da177e4 | 134 | return 0; |
1da177e4 LT |
135 | |
136 | printk(KERN_INFO "Serial console is HP DCA at select code %d\n", scode); | |
137 | ||
138 | port.uartclk = HPDCA_BAUD_BASE * 16; | |
139 | port.mapbase = (pa + UART_OFFSET); | |
140 | port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE); | |
141 | port.regshift = 1; | |
142 | port.irq = DIO_IPL(pa + DIO_VIRADDRBASE); | |
143 | ||
144 | /* Enable board-interrupts */ | |
145 | out_8(pa + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE); | |
146 | ||
0fe1c137 | 147 | if (DIO_ID(pa + DIO_VIRADDRBASE) & 0x80) |
1da177e4 | 148 | add_preferred_console("ttyS", port.line, "9600n8"); |
1da177e4 LT |
149 | #else |
150 | printk(KERN_WARNING "Serial console is DCA but support is disabled (CONFIG_HPDCA)!\n"); | |
151 | return 0; | |
152 | #endif | |
153 | } | |
154 | ||
0fe1c137 | 155 | if (early_serial_setup(&port) < 0) |
1da177e4 | 156 | printk(KERN_WARNING "hp300_setup_serial_console(): early_serial_setup() failed.\n"); |
1da177e4 LT |
157 | return 0; |
158 | } | |
159 | #endif /* CONFIG_SERIAL_8250_CONSOLE */ | |
160 | ||
161 | #ifdef CONFIG_HPDCA | |
162 | static int __devinit hpdca_init_one(struct dio_dev *d, | |
0fe1c137 | 163 | const struct dio_device_id *ent) |
1da177e4 | 164 | { |
3e5bde8e | 165 | struct uart_8250_port uart; |
1da177e4 LT |
166 | int line; |
167 | ||
168 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
169 | if (hp300_uart_scode == d->scode) { | |
170 | /* Already got it. */ | |
171 | return 0; | |
172 | } | |
173 | #endif | |
2655a2c7 | 174 | memset(&uart, 0, sizeof(uart)); |
1da177e4 LT |
175 | |
176 | /* Memory mapped I/O */ | |
3e5bde8e GU |
177 | uart.port.iotype = UPIO_MEM; |
178 | uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF; | |
179 | uart.port.irq = d->ipl; | |
180 | uart.port.uartclk = HPDCA_BAUD_BASE * 16; | |
181 | uart.port.mapbase = (d->resource.start + UART_OFFSET); | |
182 | uart.port.membase = (char *)(uart.port.mapbase + DIO_VIRADDRBASE); | |
183 | uart.port.regshift = 1; | |
184 | uart.port.dev = &d->dev; | |
2655a2c7 | 185 | line = serial8250_register_8250_port(&uart); |
1da177e4 LT |
186 | |
187 | if (line < 0) { | |
188 | printk(KERN_NOTICE "8250_hp300: register_serial() DCA scode %d" | |
3e5bde8e | 189 | " irq %d failed\n", d->scode, uart.port.irq); |
1da177e4 LT |
190 | return -ENOMEM; |
191 | } | |
192 | ||
193 | /* Enable board-interrupts */ | |
194 | out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE); | |
195 | dio_set_drvdata(d, (void *)line); | |
196 | ||
197 | /* Reset the DCA */ | |
198 | out_8(d->resource.start + DIO_VIRADDRBASE + DCA_ID, 0xff); | |
199 | udelay(100); | |
200 | ||
e51c01b0 BH |
201 | num_ports++; |
202 | ||
1da177e4 LT |
203 | return 0; |
204 | } | |
205 | #endif | |
206 | ||
207 | static int __init hp300_8250_init(void) | |
208 | { | |
0fe1c137 | 209 | static int called; |
1da177e4 LT |
210 | #ifdef CONFIG_HPAPCI |
211 | int line; | |
212 | unsigned long base; | |
2655a2c7 | 213 | struct uart_8250_port uart; |
1da177e4 LT |
214 | struct hp300_port *port; |
215 | int i; | |
216 | #endif | |
217 | if (called) | |
218 | return -ENODEV; | |
219 | called = 1; | |
220 | ||
221 | if (!MACH_IS_HP300) | |
222 | return -ENODEV; | |
223 | ||
1da177e4 | 224 | #ifdef CONFIG_HPDCA |
e51c01b0 | 225 | dio_register_driver(&hpdca_driver); |
1da177e4 LT |
226 | #endif |
227 | #ifdef CONFIG_HPAPCI | |
228 | if (hp300_model < HP_400) { | |
229 | if (!num_ports) | |
230 | return -ENODEV; | |
231 | return 0; | |
232 | } | |
233 | /* These models have the Frodo chip. | |
234 | * Port 0 is reserved for the Apollo Domain keyboard. | |
235 | * Port 1 is either the console or the DCA. | |
236 | */ | |
237 | for (i = 1; i < 4; i++) { | |
0fe1c137 AC |
238 | /* Port 1 is the console on a 425e, on other machines it's |
239 | * mapped to DCA. | |
1da177e4 LT |
240 | */ |
241 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
0fe1c137 | 242 | if (i == 1) |
1da177e4 | 243 | continue; |
1da177e4 LT |
244 | #endif |
245 | ||
246 | /* Create new serial device */ | |
247 | port = kmalloc(sizeof(struct hp300_port), GFP_KERNEL); | |
248 | if (!port) | |
249 | return -ENOMEM; | |
250 | ||
2655a2c7 | 251 | memset(&uart, 0, sizeof(uart)); |
1da177e4 LT |
252 | |
253 | base = (FRODO_BASE + FRODO_APCI_OFFSET(i)); | |
254 | ||
255 | /* Memory mapped I/O */ | |
2655a2c7 AC |
256 | uart.port.iotype = UPIO_MEM; |
257 | uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ \ | |
0fe1c137 | 258 | | UPF_BOOT_AUTOCONF; |
1da177e4 | 259 | /* XXX - no interrupt support yet */ |
2655a2c7 AC |
260 | uart.port.irq = 0; |
261 | uart.port.uartclk = HPAPCI_BAUD_BASE * 16; | |
262 | uart.port.mapbase = base; | |
263 | uart.port.membase = (char *)(base + DIO_VIRADDRBASE); | |
264 | uart.port.regshift = 2; | |
1da177e4 | 265 | |
2655a2c7 | 266 | line = serial8250_register_8250_port(&uart); |
1da177e4 LT |
267 | |
268 | if (line < 0) { | |
0fe1c137 | 269 | printk(KERN_NOTICE "8250_hp300: register_serial() APCI" |
2655a2c7 | 270 | " %d irq %d failed\n", i, uart.port.irq); |
1da177e4 LT |
271 | kfree(port); |
272 | continue; | |
273 | } | |
274 | ||
275 | port->line = line; | |
276 | port->next = hp300_ports; | |
277 | hp300_ports = port; | |
278 | ||
279 | num_ports++; | |
280 | } | |
281 | #endif | |
282 | ||
283 | /* Any boards found? */ | |
284 | if (!num_ports) | |
285 | return -ENODEV; | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | #ifdef CONFIG_HPDCA | |
291 | static void __devexit hpdca_remove_one(struct dio_dev *d) | |
292 | { | |
293 | int line; | |
294 | ||
295 | line = (int) dio_get_drvdata(d); | |
296 | if (d->resource.start) { | |
297 | /* Disable board-interrupts */ | |
298 | out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, 0); | |
299 | } | |
2b49abac | 300 | serial8250_unregister_port(line); |
1da177e4 LT |
301 | } |
302 | #endif | |
303 | ||
304 | static void __exit hp300_8250_exit(void) | |
305 | { | |
306 | #ifdef CONFIG_HPAPCI | |
307 | struct hp300_port *port, *to_free; | |
308 | ||
309 | for (port = hp300_ports; port; ) { | |
2b49abac | 310 | serial8250_unregister_port(port->line); |
1da177e4 LT |
311 | to_free = port; |
312 | port = port->next; | |
313 | kfree(to_free); | |
314 | } | |
315 | ||
316 | hp300_ports = NULL; | |
317 | #endif | |
318 | #ifdef CONFIG_HPDCA | |
319 | dio_unregister_driver(&hpdca_driver); | |
320 | #endif | |
321 | } | |
322 | ||
323 | module_init(hp300_8250_init); | |
324 | module_exit(hp300_8250_exit); | |
325 | MODULE_DESCRIPTION("HP DCA/APCI serial driver"); | |
326 | MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>"); | |
327 | MODULE_LICENSE("GPL"); |