1 | /*===============================================================*\ |
---|
2 | | Project: RTEMS support for MPC83xx | |
---|
3 | +-----------------------------------------------------------------+ |
---|
4 | | Copyright (c) 2007 | |
---|
5 | | Embedded Brains GmbH | |
---|
6 | | Obere Lagerstr. 30 | |
---|
7 | | D-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 I2C driver parameters | |
---|
18 | \*===============================================================*/ |
---|
19 | |
---|
20 | |
---|
21 | #include <mpc83xx/mpc83xx_i2cdrv.h> |
---|
22 | #include <libchip/i2c-2b-eeprom.h> |
---|
23 | #include <libchip/i2c-sc620.h> |
---|
24 | #include <bsp/irq.h> |
---|
25 | #include <bsp.h> |
---|
26 | |
---|
27 | static void i2c1_probe(mpc83xx_i2c_softc_t *self) |
---|
28 | { |
---|
29 | #if MPC83XX_CHIP_TYPE != 8309 |
---|
30 | if (((mpc83xx.clk.sccr >> (31-1)) & 0x03) > 0) { |
---|
31 | self->base_frq = |
---|
32 | (BSP_bus_frequency |
---|
33 | /((mpc83xx.clk.sccr >> (31-1)) & 0x03)); |
---|
34 | } |
---|
35 | #else /* MPC83XX_CHIP_TYPE != 8309 */ |
---|
36 | self->base_frq = BSP_bus_frequency; |
---|
37 | #endif /* MPC83XX_CHIP_TYPE != 8309 */ |
---|
38 | } |
---|
39 | |
---|
40 | #ifndef MPC83XX_BOARD_BR_UID |
---|
41 | static void i2c2_probe(mpc83xx_i2c_softc_t *self) |
---|
42 | { |
---|
43 | self->base_frq = BSP_bus_frequency; |
---|
44 | } |
---|
45 | #endif /* MPC83XX_BOARD_BR_UID */ |
---|
46 | |
---|
47 | static mpc83xx_i2c_desc_t mpc83xx_i2c_bus_tbl[] = { |
---|
48 | /* first channel */ |
---|
49 | { |
---|
50 | {/* public fields */ |
---|
51 | .ops = &mpc83xx_i2c_ops, |
---|
52 | .size = sizeof(mpc83xx_i2c_bus_tbl[0]), |
---|
53 | }, |
---|
54 | { /* our private fields */ |
---|
55 | .reg_ptr = &mpc83xx.i2c[0], |
---|
56 | .initialized = FALSE, |
---|
57 | .irq_number = BSP_IPIC_IRQ_I2C1, |
---|
58 | .base_frq = 0, /* will be set during probe */ |
---|
59 | .probe = i2c1_probe |
---|
60 | } |
---|
61 | } |
---|
62 | #ifndef MPC83XX_BOARD_BR_UID |
---|
63 | /* second channel */ |
---|
64 | , { |
---|
65 | { /* public fields */ |
---|
66 | .ops = &mpc83xx_i2c_ops, |
---|
67 | .size = sizeof(mpc83xx_i2c_bus_tbl[0]), |
---|
68 | }, |
---|
69 | { /* our private fields */ |
---|
70 | .reg_ptr = &mpc83xx.i2c[1], |
---|
71 | .initialized = FALSE, |
---|
72 | .irq_number = BSP_IPIC_IRQ_I2C2, |
---|
73 | .base_frq = 0, /* will be set during probe */ |
---|
74 | .probe = i2c2_probe |
---|
75 | } |
---|
76 | } |
---|
77 | #endif /* MPC83XX_BOARD_BR_UID */ |
---|
78 | }; |
---|
79 | |
---|
80 | /*=========================================================================*\ |
---|
81 | | Function: | |
---|
82 | \*-------------------------------------------------------------------------*/ |
---|
83 | rtems_status_code bsp_register_i2c |
---|
84 | ( |
---|
85 | /*-------------------------------------------------------------------------*\ |
---|
86 | | Purpose: | |
---|
87 | | register I2C busses and devices | |
---|
88 | +---------------------------------------------------------------------------+ |
---|
89 | | Input Parameters: | |
---|
90 | \*-------------------------------------------------------------------------*/ |
---|
91 | void /* <none> */ |
---|
92 | ) |
---|
93 | /*-------------------------------------------------------------------------*\ |
---|
94 | | Return Value: | |
---|
95 | | 0 or error code | |
---|
96 | \*=========================================================================*/ |
---|
97 | |
---|
98 | { |
---|
99 | char device_path[] = "/dev/i2c?"; |
---|
100 | size_t n = RTEMS_ARRAY_SIZE(mpc83xx_i2c_bus_tbl); |
---|
101 | size_t i; |
---|
102 | int i2c_busno[n]; |
---|
103 | |
---|
104 | /* |
---|
105 | * init I2C library (if not already done) |
---|
106 | */ |
---|
107 | rtems_libi2c_initialize (); |
---|
108 | |
---|
109 | /* |
---|
110 | * init I2C buses |
---|
111 | */ |
---|
112 | for (i = 0; i < n; ++i) { |
---|
113 | mpc83xx_i2c_desc_t *desc = &mpc83xx_i2c_bus_tbl[i]; |
---|
114 | |
---|
115 | (*desc->softc.probe)(&desc->softc); |
---|
116 | device_path[sizeof(device_path) - 2] = (char) ('1' + i); |
---|
117 | i2c_busno[i] = rtems_libi2c_register_bus(device_path, &desc->bus_desc); |
---|
118 | } |
---|
119 | |
---|
120 | #if defined(RTEMS_BSP_I2C_EEPROM_DEVICE_NAME) |
---|
121 | if (n > 0) { |
---|
122 | /* |
---|
123 | * register EEPROM to bus 1, Address 0x50 |
---|
124 | */ |
---|
125 | rtems_libi2c_register_drv(RTEMS_BSP_I2C_EEPROM_DEVICE_NAME, |
---|
126 | i2c_2b_eeprom_driver_descriptor, |
---|
127 | i2c_busno[0],0x50); |
---|
128 | } |
---|
129 | #elif defined(MPC83XX_BOARD_BR_UID) |
---|
130 | if (n > 0) { |
---|
131 | rtems_libi2c_register_drv( |
---|
132 | "sc620", |
---|
133 | &i2c_sc620_driver, |
---|
134 | i2c_busno[0], |
---|
135 | 0x70 |
---|
136 | ); |
---|
137 | } |
---|
138 | #else |
---|
139 | |
---|
140 | /* |
---|
141 | * We have no i2c configuration for this variant but need to mark |
---|
142 | * i2c_busno as used. |
---|
143 | */ |
---|
144 | (void) i2c_busno[0]; /* avoid set but not used warning */ |
---|
145 | #endif |
---|
146 | |
---|
147 | /* |
---|
148 | * FIXME: register RTC driver, when available |
---|
149 | */ |
---|
150 | |
---|
151 | return RTEMS_SUCCESSFUL; |
---|
152 | } |
---|