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Wolfgang Denk9d407992006-07-10 23:07:28 +02001#include <common.h>
2#include <mpc8xx.h>
3#include <pcmcia.h>
4#include <i2c.h>
5
6#undef CONFIG_PCMCIA
7
Jon Loeligerc508a4c2007-07-09 18:31:28 -05008#if defined(CONFIG_CMD_PCMCIA)
Wolfgang Denk9d407992006-07-10 23:07:28 +02009#define CONFIG_PCMCIA
10#endif
11
Jon Loeligerc508a4c2007-07-09 18:31:28 -050012#if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
Wolfgang Denk9d407992006-07-10 23:07:28 +020013#define CONFIG_PCMCIA
14#endif
15
16#ifdef CONFIG_PCMCIA
17
18#define PCMCIA_BOARD_MSG "LWMON"
19
20/* #define's for MAX1604 Power Switch */
21#define MAX1604_OP_SUS 0x80
22#define MAX1604_VCCBON 0x40
23#define MAX1604_VCC_35 0x20
24#define MAX1604_VCCBHIZ 0x10
25#define MAX1604_VPPBON 0x08
26#define MAX1604_VPPBPBPGM 0x04
27#define MAX1604_VPPBHIZ 0x02
28/* reserved 0x01 */
29
30int pcmcia_hardware_enable(int slot)
31{
32 volatile immap_t *immap;
33 volatile cpm8xx_t *cp;
34 volatile pcmconf8xx_t *pcmp;
35 volatile sysconf8xx_t *sysp;
36 uint reg, mask;
37 uchar val;
38
39
40 debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
41
42 /* Switch on PCMCIA port in PIC register 0x60 */
43 reg = pic_read (0x60);
44 debug ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg);
45 reg &= ~0x10;
46 /* reg |= 0x08; Vpp not needed */
47 pic_write (0x60, reg);
48#ifdef DEBUG
49 reg = pic_read (0x60);
50 printf ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg);
51#endif
52 udelay(10000);
53
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020054 immap = (immap_t *)CONFIG_SYS_IMMR;
55 sysp = (sysconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_siu_conf));
56 pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
57 cp = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
Wolfgang Denk9d407992006-07-10 23:07:28 +020058
59 /*
60 * Configure SIUMCR to enable PCMCIA port B
61 * (VFLS[0:1] are not used for debugging, we connect FRZ# instead)
62 */
63 sysp->sc_siumcr &= ~SIUMCR_DBGC11; /* set DBGC to 00 */
64
65 /* clear interrupt state, and disable interrupts */
66 pcmp->pcmc_pscr = PCMCIA_MASK(_slot_);
67 pcmp->pcmc_per &= ~PCMCIA_MASK(_slot_);
68
69 /*
70 * Disable interrupts, DMA, and PCMCIA buffers
71 * (isolate the interface) and assert RESET signal
72 */
73 debug ("Disable PCMCIA buffers and assert RESET\n");
74 reg = 0;
75 reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
76 reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
77 PCMCIA_PGCRX(_slot_) = reg;
78 udelay(500);
79
80 /*
81 * Make sure there is a card in the slot, then configure the interface.
82 */
83 udelay(10000);
84 debug ("[%d] %s: PIPR(%p)=0x%x\n",
85 __LINE__,__FUNCTION__,
86 &(pcmp->pcmc_pipr),pcmp->pcmc_pipr);
87 if (pcmp->pcmc_pipr & (0x18000000 >> (slot << 4))) {
88 printf (" No Card found\n");
89 return (1);
90 }
91
92 /*
93 * Power On.
94 */
95 mask = PCMCIA_VS1(slot) | PCMCIA_VS2(slot);
96 reg = pcmp->pcmc_pipr;
97 debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n",
98 reg,
99 (reg&PCMCIA_VS1(slot))?"n":"ff",
100 (reg&PCMCIA_VS2(slot))?"n":"ff");
101 if ((reg & mask) == mask) {
102 val = 0; /* VCCB3/5 = 0 ==> use Vx = 5.0 V */
103 puts (" 5.0V card found: ");
104 } else {
105 val = MAX1604_VCC_35; /* VCCB3/5 = 1 ==> use Vy = 3.3 V */
106 puts (" 3.3V card found: ");
107 }
108
109 /* switch VCC on */
110 val |= MAX1604_OP_SUS | MAX1604_VCCBON;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200111 i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
112 i2c_write (CONFIG_SYS_I2C_POWER_A_ADDR, 0, 0, &val, 1);
Wolfgang Denk9d407992006-07-10 23:07:28 +0200113
114 udelay(500000);
115
116 debug ("Enable PCMCIA buffers and stop RESET\n");
117 reg = PCMCIA_PGCRX(_slot_);
118 reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */
119 reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */
120 PCMCIA_PGCRX(_slot_) = reg;
121
122 udelay(250000); /* some cards need >150 ms to come up :-( */
123
124 debug ("# hardware_enable done\n");
125
126 return (0);
127}
128
129
Jon Loeligerc508a4c2007-07-09 18:31:28 -0500130#if defined(CONFIG_CMD_PCMCIA)
Wolfgang Denk9d407992006-07-10 23:07:28 +0200131int pcmcia_hardware_disable(int slot)
132{
133 volatile immap_t *immap;
134 volatile pcmconf8xx_t *pcmp;
135 u_long reg;
136 uchar val;
137
138 debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
139
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200140 immap = (immap_t *)CONFIG_SYS_IMMR;
141 pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
Wolfgang Denk9d407992006-07-10 23:07:28 +0200142
143 /* remove all power, put output in high impedance state */
144 val = MAX1604_VCCBHIZ | MAX1604_VPPBHIZ;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200145 i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
146 i2c_write (CONFIG_SYS_I2C_POWER_A_ADDR, 0, 0, &val, 1);
Wolfgang Denk9d407992006-07-10 23:07:28 +0200147
148 /* Configure PCMCIA General Control Register */
149 debug ("Disable PCMCIA buffers and assert RESET\n");
150 reg = 0;
151 reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
152 reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
153 PCMCIA_PGCRX(_slot_) = reg;
154
155 /* Switch off PCMCIA port in PIC register 0x60 */
156 reg = pic_read (0x60);
157 debug ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg);
158 reg |= 0x10;
159 reg &= ~0x08;
160 pic_write (0x60, reg);
161#ifdef DEBUG
162 reg = pic_read (0x60);
163 printf ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg);
164#endif
165 udelay(10000);
166
167 return (0);
168}
Jon Loeligerd39b5742007-07-10 10:48:22 -0500169#endif
Wolfgang Denk9d407992006-07-10 23:07:28 +0200170
171
172int pcmcia_voltage_set(int slot, int vcc, int vpp)
173{
174 volatile immap_t *immap;
175 volatile pcmconf8xx_t *pcmp;
176 u_long reg;
177 uchar val;
178
179 debug ("voltage_set: "
180 PCMCIA_BOARD_MSG
181 " Slot %c, Vcc=%d.%d, Vpp=%d.%d\n",
182 'A'+slot, vcc/10, vcc%10, vpp/10, vcc%10);
183
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200184 immap = (immap_t *)CONFIG_SYS_IMMR;
185 pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
Wolfgang Denk9d407992006-07-10 23:07:28 +0200186 /*
187 * Disable PCMCIA buffers (isolate the interface)
188 * and assert RESET signal
189 */
190 debug ("Disable PCMCIA buffers and assert RESET\n");
191 reg = PCMCIA_PGCRX(_slot_);
192 reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
193 reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
194 PCMCIA_PGCRX(_slot_) = reg;
195 udelay(500);
196
197 /*
198 * Turn off all power (switch to high impedance)
199 */
200 debug ("PCMCIA power OFF\n");
201 val = MAX1604_VCCBHIZ | MAX1604_VPPBHIZ;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200202 i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
203 i2c_write (CONFIG_SYS_I2C_POWER_A_ADDR, 0, 0, &val, 1);
Wolfgang Denk9d407992006-07-10 23:07:28 +0200204
205 val = 0;
206 switch(vcc) {
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200207 case 0: break;
Wolfgang Denk9d407992006-07-10 23:07:28 +0200208 case 33: val = MAX1604_VCC_35; break;
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200209 case 50: break;
210 default: goto done;
Wolfgang Denk9d407992006-07-10 23:07:28 +0200211 }
212
213 /* Checking supported voltages */
214
215 debug ("PIPR: 0x%x --> %s\n",
216 pcmp->pcmc_pipr,
217 (pcmp->pcmc_pipr & 0x00008000) ? "only 5 V" : "can do 3.3V");
218
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200219 i2c_write (CONFIG_SYS_I2C_POWER_A_ADDR, 0, 0, &val, 1);
Wolfgang Denk9d407992006-07-10 23:07:28 +0200220 if (val) {
221 debug ("PCMCIA powered at %sV\n",
222 (val & MAX1604_VCC_35) ? "3.3" : "5.0");
223 } else {
224 debug ("PCMCIA powered down\n");
225 }
226
227done:
228 debug ("Enable PCMCIA buffers and stop RESET\n");
229 reg = PCMCIA_PGCRX(_slot_);
230 reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */
231 reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */
232 PCMCIA_PGCRX(_slot_) = reg;
233 udelay(500);
234
235 debug ("voltage_set: " PCMCIA_BOARD_MSG " Slot %c, DONE\n",
236 slot+'A');
237 return (0);
238}
239
240#endif /* CONFIG_PCMCIA */