blob: 20f653ba2ba381ad34363c32275dd354e8e8d646 [file] [log] [blame]
Wolfgang Denk9d407992006-07-10 23:07:28 +02001#include <common.h>
2#include <mpc8xx.h>
3#include <pcmcia.h>
4
5#undef CONFIG_PCMCIA
6
7#if (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
8#define CONFIG_PCMCIA
9#endif
10
11#if (CONFIG_COMMANDS & CFG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
12#define CONFIG_PCMCIA
13#endif
14
15#ifdef CONFIG_PCMCIA
16
17#define PCMCIA_BOARD_MSG "ICU862"
18
19static void cfg_port_B (void)
20{
21 volatile immap_t *immap;
22 volatile cpm8xx_t *cp;
23 uint reg;
24
25 immap = (immap_t *)CFG_IMMR;
26 cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm));
27
28 /*
29 * Configure Port B for TPS2205 PC-Card Power-Interface Switch
30 *
31 * Switch off all voltages, assert shutdown
32 */
33 reg = cp->cp_pbdat;
34 reg |= (TPS2205_VPP_PGM | TPS2205_VPP_VCC | /* VAVPP => Hi-Z */
35 TPS2205_VCC3 | TPS2205_VCC5 | /* VAVCC => Hi-Z */
36 TPS2205_SHDN); /* enable switch */
37 cp->cp_pbdat = reg;
38
39 cp->cp_pbpar &= ~(TPS2205_INPUTS | TPS2205_OUTPUTS);
40
41 reg = cp->cp_pbdir & ~(TPS2205_INPUTS);
42 cp->cp_pbdir = reg | TPS2205_OUTPUTS;
43
44 debug ("Set Port B: PAR: %08x DIR: %08x DAT: %08x\n",
45 cp->cp_pbpar, cp->cp_pbdir, cp->cp_pbdat);
46}
47
48int pcmcia_hardware_enable(int slot)
49{
50 volatile immap_t *immap;
51 volatile cpm8xx_t *cp;
52 volatile pcmconf8xx_t *pcmp;
53 volatile sysconf8xx_t *sysp;
54 uint reg, pipr, mask;
55 int i;
56
57 debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
58
59 udelay(10000);
60
61 immap = (immap_t *)CFG_IMMR;
62 sysp = (sysconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_siu_conf));
63 pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
64 cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm));
65
66 /* Configure Port B for TPS2205 PC-Card Power-Interface Switch */
67 cfg_port_B ();
68
69 /*
70 * Configure SIUMCR to enable PCMCIA port B
71 * (VFLS[0:1] are not used for debugging, we connect FRZ# instead)
72 */
73 sysp->sc_siumcr &= ~SIUMCR_DBGC11; /* set DBGC to 00 */
74
75 /* clear interrupt state, and disable interrupts */
76 pcmp->pcmc_pscr = PCMCIA_MASK(_slot_);
77 pcmp->pcmc_per &= ~PCMCIA_MASK(_slot_);
78
79 /*
80 * Disable interrupts, DMA, and PCMCIA buffers
81 * (isolate the interface) and assert RESET signal
82 */
83 debug ("Disable PCMCIA buffers and assert RESET\n");
84 reg = 0;
85 reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
86 reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
87 PCMCIA_PGCRX(_slot_) = reg;
88 udelay(500);
89
90 /*
91 * Make sure there is a card in the slot, then configure the interface.
92 */
93 udelay(10000);
94 debug ("[%d] %s: PIPR(%p)=0x%x\n",
95 __LINE__,__FUNCTION__,
96 &(pcmp->pcmc_pipr),pcmp->pcmc_pipr);
97 if (pcmp->pcmc_pipr & (0x18000000 >> (slot << 4))) {
98 printf (" No Card found\n");
99 return (1);
100 }
101
102 /*
103 * Power On: Set VAVCC to 3.3V or 5V, set VAVPP to Hi-Z
104 */
105 mask = PCMCIA_VS1(slot) | PCMCIA_VS2(slot);
106 pipr = pcmp->pcmc_pipr;
107 debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n",
108 pipr,
109 (reg&PCMCIA_VS1(slot))?"n":"ff",
110 (reg&PCMCIA_VS2(slot))?"n":"ff");
111
112 reg = cp->cp_pbdat;
113 if ((pipr & mask) == mask) {
114 reg |= (TPS2205_VPP_PGM | TPS2205_VPP_VCC | /* VAVPP => Hi-Z */
115 TPS2205_VCC3); /* 3V off */
116 reg &= ~(TPS2205_VCC5); /* 5V on */
117 puts (" 5.0V card found: ");
118 } else {
119 reg |= (TPS2205_VPP_PGM | TPS2205_VPP_VCC | /* VAVPP => Hi-Z */
120 TPS2205_VCC5); /* 5V off */
121 reg &= ~(TPS2205_VCC3); /* 3V on */
122 puts (" 3.3V card found: ");
123 }
124
125 debug ("\nPB DAT: %08x -> 3.3V %s 5.0V %s VPP_PGM %s VPP_VCC %s\n",
126 reg,
127 (reg & TPS2205_VCC3) ? "off" : "on",
128 (reg & TPS2205_VCC5) ? "off" : "on",
129 (reg & TPS2205_VPP_PGM) ? "off" : "on",
130 (reg & TPS2205_VPP_VCC) ? "off" : "on" );
131
132 cp->cp_pbdat = reg;
133
134 /* Wait 500 ms; use this to check for over-current */
135 for (i=0; i<5000; ++i) {
136 if ((cp->cp_pbdat & TPS2205_OC) == 0) {
137 printf (" *** Overcurrent - Safety shutdown ***\n");
138 cp->cp_pbdat &= ~(TPS2205_SHDN);
139 return (1);
140 }
141 udelay (100);
142 }
143
144 debug ("Enable PCMCIA buffers and stop RESET\n");
145 reg = PCMCIA_PGCRX(_slot_);
146 reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */
147 reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */
148 PCMCIA_PGCRX(_slot_) = reg;
149
150 udelay(250000); /* some cards need >150 ms to come up :-( */
151
152 debug ("# hardware_enable done\n");
153
154 return (0);
155}
156
157
158#if (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
159int pcmcia_hardware_disable(int slot)
160{
161 volatile immap_t *immap;
162 volatile cpm8xx_t *cp;
163 volatile pcmconf8xx_t *pcmp;
164 u_long reg;
165
166 debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
167
168 immap = (immap_t *)CFG_IMMR;
169 cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm));
170 pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
171
172 /* Shut down */
173 cp->cp_pbdat &= ~(TPS2205_SHDN);
174
175 /* Configure PCMCIA General Control Register */
176 debug ("Disable PCMCIA buffers and assert RESET\n");
177 reg = 0;
178 reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
179 reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
180 PCMCIA_PGCRX(_slot_) = reg;
181
182 udelay(10000);
183
184 return (0);
185}
186#endif /* CFG_CMD_PCMCIA */
187
188
189int pcmcia_voltage_set(int slot, int vcc, int vpp)
190{
191 volatile immap_t *immap;
192 volatile cpm8xx_t *cp;
193 volatile pcmconf8xx_t *pcmp;
194 u_long reg;
195
196 debug ("voltage_set: "
197 PCMCIA_BOARD_MSG
198 " Slot %c, Vcc=%d.%d, Vpp=%d.%d\n",
199 'A'+slot, vcc/10, vcc%10, vpp/10, vcc%10);
200
201 immap = (immap_t *)CFG_IMMR;
202 cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm));
203 pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
204 /*
205 * Disable PCMCIA buffers (isolate the interface)
206 * and assert RESET signal
207 */
208 debug ("Disable PCMCIA buffers and assert RESET\n");
209 reg = PCMCIA_PGCRX(_slot_);
210 reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
211 reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
212 PCMCIA_PGCRX(_slot_) = reg;
213 udelay(500);
214
215 /*
216 * Configure Port C pins for
217 * 5 Volts Enable and 3 Volts enable,
218 * Turn all power pins to Hi-Z
219 */
220 debug ("PCMCIA power OFF\n");
221 cfg_port_B (); /* Enables switch, but all in Hi-Z */
222
223 reg = cp->cp_pbdat;
224
225 switch(vcc) {
226 case 0: break; /* Switch off */
227 case 33: reg &= ~TPS2205_VCC3; break; /* Switch on 3.3V */
228 case 50: reg &= ~TPS2205_VCC5; break; /* Switch on 5.0V */
229 default: goto done;
230 }
231
232 /* Checking supported voltages */
233
234 debug ("PIPR: 0x%x --> %s\n",
235 pcmp->pcmc_pipr,
236 (pcmp->pcmc_pipr & 0x00008000) ? "only 5 V" : "can do 3.3V");
237
238 cp->cp_pbdat = reg;
239
240#ifdef DEBUG
241{
242 char *s;
243
244 if ((reg & TPS2205_VCC3) == 0) {
245 s = "at 3.3V";
246 } else if ((reg & TPS2205_VCC5) == 0) {
247 s = "at 5.0V";
248 } else {
249 s = "down";
250 }
251 printf ("PCMCIA powered %s\n", s);
252}
253#endif
254
255done:
256 debug ("Enable PCMCIA buffers and stop RESET\n");
257 reg = PCMCIA_PGCRX(_slot_);
258 reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */
259 reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */
260 PCMCIA_PGCRX(_slot_) = reg;
261 udelay(500);
262
263 debug ("voltage_set: " PCMCIA_BOARD_MSG " Slot %c, DONE\n",
264 slot+'A');
265 return (0);
266}
267
268#endif /* CONFIG_PCMCIA */