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source: rtems/bsps/powerpc/gen83xx/spi/spi_init.c @ e560ee85

Last change on this file since e560ee85 was e560ee85, checked in by Joel Sherrill <joel@…>, on 03/01/22 at 21:38:55

bsps/powerpc/: Scripted embedded brains header file clean up

Updates #4625.

Property mode set to 100644

File size: 12.8 KB

Line
1	/===============================================================\
2	\| Project: RTEMS support for MPC83xx \|
3	+-----------------------------------------------------------------+
4	\| Copyright (c) 2007 \|
5	\| embedded brains GmbH \|
6	\| Obere Lagerstr. 30 \|
7	\| 82178 Puchheim \|
8	\| Germany \|
9	\| rtems@embedded-brains.de \|
10	+-----------------------------------------------------------------+
11	\| The license and distribution terms for this file may be \|
12	\| found in the file LICENSE in this distribution or at \|
13	\| \|
14	\| http://www.rtems.org/license/LICENSE. \|
15	\| \|
16	+-----------------------------------------------------------------+
17	\| this file contains the low level MPC83xx SPI driver parameters \|
18	\| and board-specific functions \|
19	\===============================================================/
20
21
22	#include <mpc83xx/mpc83xx_spidrv.h>
23	#include <bsp/irq.h>
24	#include <bsp.h>
25
26	#if defined(MPC83XX_BOARD_MPC8313ERDB)
27
28	#include <libchip/spi-sd-card.h>
29
30	#elif defined(MPC83XX_BOARD_MPC8349EAMDS)
31
32	#include <libchip/spi-flash-m25p40.h>
33
34	#elif defined(MPC83XX_BOARD_HSC_CM01)
35
36	#include <libchip/spi-fram-fm25l256.h>
37
38	#endif
39
40	/=========================================================================\
41	\| Board-specific adaptation functions \|
42	\=========================================================================/
43
44	/=========================================================================\
45	\| Function: \|
46	\-------------------------------------------------------------------------/
47	static rtems_status_code bsp_spi_sel_addr
48	(
49	/-------------------------------------------------------------------------\
50	\| Purpose: \|
51	\| address a slave device on the bus \|
52	+---------------------------------------------------------------------------+
53	\| Input Parameters: \|
54	\-------------------------------------------------------------------------/
55	rtems_libi2c_bus_t bh, / bus specifier structure */
56	uint32_t addr, /* address to send on bus */
57	int rw /* 0=write,1=read */
58	)
59	/-------------------------------------------------------------------------\
60	\| Return Value: \|
61	\| o = ok or error code \|
62	\=========================================================================/
63	{
64
65	#if defined( MPC83XX_BOARD_MPC8313ERDB)
66
67	/* Check address */
68	if (addr > 0) {
69	return RTEMS_INVALID_NUMBER;
70	}
71
72	/* SCS (active low) */
73	mpc83xx.gpio [0].gpdat &= ~0x20000000;
74
75	#elif defined( MPC83XX_BOARD_MPC8349EAMDS)
76
77	/*
78	* check device address for valid range
79	*/
80	if (addr > 0) {
81	return RTEMS_INVALID_NUMBER;
82	}
83	/*
84	* select given device
85	* GPIO1[0] is nSEL_SPI for M25P40
86	* set it to be active/low
87	*/
88	mpc83xx.gpio[0].gpdat &= ~(1 << (31- 0));
89
90	#elif defined( MPC83XX_BOARD_HSC_CM01)
91
92	/*
93	* check device address for valid range
94	*/
95	if (addr > 7) {
96	return RTEMS_INVALID_NUMBER;
97	}
98	/*
99	* select given device
100	*/
101	/*
102	* GPIO1[24] is SPI_A0
103	* GPIO1[25] is SPI_A1
104	* GPIO1[26] is SPI_A2
105	* set pins to address
106	*/
107	mpc83xx.gpio[0].gpdat =
108	(mpc83xx.gpio[0].gpdat & ~(0x7 << (31-26)))
109	\| (addr << (31-26));
110	/*
111	* GPIO1[27] is high-active strobe
112	*/
113	mpc83xx.gpio[0].gpdat \|= (1 << (31- 27));
114
115	#endif
116
117	return RTEMS_SUCCESSFUL;
118	}
119
120	/=========================================================================\
121	\| Function: \|
122	\-------------------------------------------------------------------------/
123	static rtems_status_code bsp_spi_send_start_dummy
124	(
125	/-------------------------------------------------------------------------\
126	\| Purpose: \|
127	\| dummy function, SPI has no start condition \|
128	+---------------------------------------------------------------------------+
129	\| Input Parameters: \|
130	\-------------------------------------------------------------------------/
131	rtems_libi2c_bus_t bh / bus specifier structure */
132	)
133	/-------------------------------------------------------------------------\
134	\| Return Value: \|
135	\| o = ok or error code \|
136	\=========================================================================/
137	{
138
139	#if defined( MPC83XX_BOARD_MPC8313ERDB)
140
141	/* SCS (inactive high) */
142	mpc83xx.gpio [0].gpdat \|= 0x20000000;
143
144	#elif defined( MPC83XX_BOARD_MPC8349EAMDS)
145
146	/*
147	* GPIO1[0] is nSEL_SPI for M25P40
148	* set it to inactive/high
149	*/
150	mpc83xx.gpio[0].gpdat \|= (1 << (31- 0));
151
152	#elif defined( MPC83XX_BOARD_HSC_CM01)
153
154	/*
155	* GPIO1[27] is high-active strobe
156	* set it to inactive/ low
157	*/
158	mpc83xx.gpio[0].gpdat &= ~(0x1 << (31-27));
159
160	#endif
161
162	return 0;
163	}
164
165	/=========================================================================\
166	\| Function: \|
167	\-------------------------------------------------------------------------/
168	static rtems_status_code bsp_spi_send_stop
169	(
170	/-------------------------------------------------------------------------\
171	\| Purpose: \|
172	\| deselect SPI \|
173	+---------------------------------------------------------------------------+
174	\| Input Parameters: \|
175	\-------------------------------------------------------------------------/
176	rtems_libi2c_bus_t bh / bus specifier structure */
177	)
178	/-------------------------------------------------------------------------\
179	\| Return Value: \|
180	\| o = ok or error code \|
181	\=========================================================================/
182	{
183	#if defined(DEBUG)
184	printk("bsp_spi_send_stop called... ");
185	#endif
186
187	#if defined( MPC83XX_BOARD_MPC8313ERDB)
188
189	/* SCS (inactive high) */
190	mpc83xx.gpio [0].gpdat \|= 0x20000000;
191
192	#elif defined( MPC83XX_BOARD_MPC8349EAMDS)
193
194	/*
195	* deselect given device
196	* GPIO1[0] is nSEL_SPI for M25P40
197	* set it to be inactive/high
198	*/
199	mpc83xx.gpio[0].gpdat \|= (1 << (31- 0));
200
201	#elif defined( MPC83XX_BOARD_HSC_CM01)
202
203	/*
204	* deselect device
205	* GPIO1[27] is high-active strobe
206	*/
207	mpc83xx.gpio[0].gpdat &= ~(1 << (31- 27));
208
209	#endif
210
211	#if defined(DEBUG)
212	printk("... exit OK\r\n");
213	#endif
214	return 0;
215	}
216
217	/=========================================================================\
218	\| list of handlers \|
219	\=========================================================================/
220
221	rtems_libi2c_bus_ops_t bsp_spi_ops = {
222	.init = mpc83xx_spi_init,
223	.send_start = bsp_spi_send_start_dummy,
224	.send_stop = bsp_spi_send_stop,
225	.send_addr = bsp_spi_sel_addr,
226	.read_bytes = mpc83xx_spi_read_bytes,
227	.write_bytes = mpc83xx_spi_write_bytes,
228	.ioctl = mpc83xx_spi_ioctl
229	};
230
231	static mpc83xx_spi_desc_t bsp_spi_bus_desc = {
232	{/* public fields */
233	.ops = &bsp_spi_ops,
234	.size = sizeof(bsp_spi_bus_desc)
235	},
236	{ /* our private fields */
237	.reg_ptr =&mpc83xx.spi,
238	.initialized = FALSE,
239	.irq_number = BSP_IPIC_IRQ_SPI,
240	.base_frq = 0 /* filled in during init */
241	}
242	};
243
244	#ifdef MPC83XX_BOARD_MPC8313ERDB
245
246	#include <libchip/spi-sd-card.h>
247
248	#define SD_CARD_NUMBER 1
249
250	size_t sd_card_driver_table_size = SD_CARD_NUMBER;
251
252	sd_card_driver_entry sd_card_driver_table [SD_CARD_NUMBER] = {
253	{
254	.device_name = "/dev/sd-card-a",
255	.bus = 0,
256	.transfer_mode = SD_CARD_TRANSFER_MODE_DEFAULT,
257	.command = SD_CARD_COMMAND_DEFAULT,
258	/* .response = whatever, */
259	.response_index = SD_CARD_COMMAND_SIZE,
260	.n_ac_max = SD_CARD_N_AC_MAX_DEFAULT,
261	.block_number = 0,
262	.block_size = 0,
263	.block_size_shift = 0,
264	.busy = true,
265	.verbose = true,
266	.schedule_if_busy = false
267	}
268	};
269
270	#endif /* MPC83XX_BOARD_MPC8313ERDB */
271
272
273	/=========================================================================\
274	\| initialization \|
275	\=========================================================================/
276
277	/=========================================================================\
278	\| Function: \|
279	\-------------------------------------------------------------------------/
280	rtems_status_code bsp_register_spi
281	(
282	/-------------------------------------------------------------------------\
283	\| Purpose: \|
284	\| register SPI bus and devices \|
285	+---------------------------------------------------------------------------+
286	\| Input Parameters: \|
287	\-------------------------------------------------------------------------/
288	void /* <none> */
289	)
290	/-------------------------------------------------------------------------\
291	\| Return Value: \|
292	\| 0 or error code \|
293	\=========================================================================/
294	{
295	#if defined(MPC83XX_BOARD_MPC8313ERDB)
296	rtems_status_code sc = RTEMS_SUCCESSFUL;
297	#endif
298	unsigned spi_busno;
299	int ret_code;
300
301	/*
302	* init I2C library (if not already done)
303	*/
304	rtems_libi2c_initialize ();
305
306	/*
307	* init port pins used to address/select SPI devices
308	*/
309
310	#if defined(MPC83XX_BOARD_MPC8313ERDB)
311
312	/*
313	* Configured as master (direct connection to SD card)
314	*
315	* GPIO[28] : SOUT
316	* GPIO[29] : SIN
317	* GPIO[30] : SCLK
318	* GPIO[02] : SCS (inactive high), GPIO[02] is normally connected to U43 at
319	* pin 15 of MC74LCX244DT.
320	*/
321
322	/* Function */
323	mpc83xx.syscon.sicrl = (mpc83xx.syscon.sicrl & ~0x03fc0000) \| 0x30000000;
324
325	/* Direction */
326	mpc83xx.gpio [0].gpdir = (mpc83xx.gpio [0].gpdir & ~0x0000000f) \| 0x2000000b;
327
328	/* Data */
329	mpc83xx.gpio [0].gpdat \|= 0x20000000;
330
331	/* Open Drain */
332	/* mpc83xx.gpio [0].gpdr \|= 0x0000000f; */
333
334	#elif defined(MPC83XX_BOARD_MPC8349EAMDS)
335
336	/*
337	* GPIO1[0] is nSEL_SPI for M25P40
338	* set it to be output, high
339	*/
340	mpc83xx.gpio[0].gpdat \|= (1 << (31- 0));
341	mpc83xx.gpio[0].gpdir \|= (1 << (31- 0));
342	mpc83xx.gpio[0].gpdr &= ~(1 << (31- 0));
343
344	#elif defined(MPC83XX_BOARD_HSC_CM01)
345
346	/*
347	* GPIO1[24] is SPI_A0
348	* GPIO1[25] is SPI_A1
349	* GPIO1[26] is SPI_A2
350	* GPIO1[27] is high-active strobe
351	* set pins to be output, low
352	*/
353	mpc83xx.gpio[0].gpdat &= ~(0xf << (31-27));
354	mpc83xx.gpio[0].gpdir \|= (0xf << (31-27));
355	mpc83xx.gpio[0].gpdr &= ~(0xf << (31-27));
356
357	#else
358
359	/*
360	* There is no SPI configuration information for this variant.
361	*/
362	(void) spi_busno; /* avoid set but not used warning */
363	#endif
364
365	/*
366	* update base frequency in spi descriptor
367	*/
368	bsp_spi_bus_desc.softc.base_frq = BSP_bus_frequency;
369
370	/*
371	* register SPI bus
372	*/
373	ret_code = rtems_libi2c_register_bus("/dev/spi",
374	&(bsp_spi_bus_desc.bus_desc));
375	if (ret_code < 0) {
376	return -ret_code;
377	}
378	spi_busno = (unsigned) ret_code;
379
380	#if defined(MPC83XX_BOARD_MPC8313ERDB)
381
382	/* Register SD Card driver */
383	sd_card_driver_table [0].bus = spi_busno;
384	sc = sd_card_register();
385	if (sc != RTEMS_SUCCESSFUL) {
386	return sc;
387	}
388
389	#elif defined(MPC83XX_BOARD_MPC8349EAMDS)
390
391	/*
392	* register M25P40 Flash
393	*/
394	ret_code = rtems_libi2c_register_drv(RTEMS_BSP_SPI_FLASH_DEVICE_NAME,
395	spi_flash_m25p40_rw_driver_descriptor,
396	spi_busno,0x00);
397	#elif defined(MPC83XX_BOARD_HSC_CM01)
398
399	/*
400	* register FM25L256 FRAM
401	*/
402	ret_code = rtems_libi2c_register_drv(RTEMS_BSP_SPI_FRAM_DEVICE_NAME,
403	spi_fram_fm25l256_rw_driver_descriptor,
404	spi_busno,0x02);
405
406	#endif
407
408	if (ret_code < 0) {
409	return -ret_code;
410	}
411
412	/*
413	* FIXME: further drivers, when available
414	*/
415	return 0;
416	}

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