2 * Sonics Silicon Backplane
3 * PCMCIA-Hostbus related functions
5 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2007 Michael Buesch <mb@bu3sch.de>
8 * Licensed under the GNU/GPL. See COPYING for details.
11 #include <linux/ssb/ssb.h>
12 #include <linux/delay.h>
14 #include <pcmcia/cs_types.h>
15 #include <pcmcia/cs.h>
16 #include <pcmcia/cistpl.h>
17 #include <pcmcia/ciscode.h>
18 #include <pcmcia/ds.h>
19 #include <pcmcia/cisreg.h>
21 #include "ssb_private.h"
24 int ssb_pcmcia_switch_coreidx(struct ssb_bus *bus,
27 struct pcmcia_device *pdev = bus->host_pcmcia;
35 addr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE;
37 reg.Action = CS_WRITE;
39 reg.Value = (addr & 0x0000F000) >> 12;
40 err = pcmcia_access_configuration_register(pdev, ®);
41 if (err != CS_SUCCESS)
44 reg.Value = (addr & 0x00FF0000) >> 16;
45 err = pcmcia_access_configuration_register(pdev, ®);
46 if (err != CS_SUCCESS)
49 reg.Value = (addr & 0xFF000000) >> 24;
50 err = pcmcia_access_configuration_register(pdev, ®);
51 if (err != CS_SUCCESS)
58 err = pcmcia_access_configuration_register(pdev, ®);
59 if (err != CS_SUCCESS)
61 read_addr |= (reg.Value & 0xF) << 12;
63 err = pcmcia_access_configuration_register(pdev, ®);
64 if (err != CS_SUCCESS)
66 read_addr |= reg.Value << 16;
68 err = pcmcia_access_configuration_register(pdev, ®);
69 if (err != CS_SUCCESS)
71 read_addr |= reg.Value << 24;
73 cur_core = (read_addr - SSB_ENUM_BASE) / SSB_CORE_SIZE;
74 if (cur_core == coreidx)
77 if (attempts++ > SSB_BAR0_MAX_RETRIES)
84 ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
88 int ssb_pcmcia_switch_core(struct ssb_bus *bus,
89 struct ssb_device *dev)
94 ssb_dprintk(KERN_INFO PFX
95 "Switching to %s core, index %d\n",
96 ssb_core_name(dev->id.coreid),
99 spin_lock_irqsave(&bus->bar_lock, flags);
100 err = ssb_pcmcia_switch_coreidx(bus, dev->core_index);
102 bus->mapped_device = dev;
103 spin_unlock_irqrestore(&bus->bar_lock, flags);
108 int ssb_pcmcia_switch_segment(struct ssb_bus *bus, u8 seg)
115 assert(seg == 0 || seg == 1);
118 spin_lock_irqsave(&bus->bar_lock, flags);
120 reg.Action = CS_WRITE;
122 res = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
123 if (unlikely(res != CS_SUCCESS))
126 reg.Action = CS_READ;
127 res = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
128 if (unlikely(res != CS_SUCCESS))
131 if (reg.Value == seg)
134 if (unlikely(attempts++ > SSB_BAR0_MAX_RETRIES))
138 bus->mapped_pcmcia_seg = seg;
140 spin_unlock_irqrestore(&bus->bar_lock, flags);
143 ssb_printk(KERN_ERR PFX "Failed to switch pcmcia segment\n");
148 static inline int do_select_core(struct ssb_bus *bus,
149 struct ssb_device *dev,
153 u8 need_seg = (*offset >= 0x800) ? 1 : 0;
155 if (unlikely(dev != bus->mapped_device)) {
156 err = ssb_pcmcia_switch_core(bus, dev);
160 if (unlikely(need_seg != bus->mapped_pcmcia_seg)) {
161 err = ssb_pcmcia_switch_segment(bus, need_seg);
171 static u16 ssb_pcmcia_read16(struct ssb_device *dev, u16 offset)
173 struct ssb_bus *bus = dev->bus;
176 if (unlikely(do_select_core(bus, dev, &offset)))
178 x = readw(bus->mmio + offset);
179 //printk("R16 0x%04X, 0x%04X\n", offset, x);
183 static u32 ssb_pcmcia_read32(struct ssb_device *dev, u16 offset)
185 struct ssb_bus *bus = dev->bus;
188 if (unlikely(do_select_core(bus, dev, &offset)))
190 x = readl(bus->mmio + offset);
191 //printk("R32 0x%04X, 0x%08X\n", offset, x);
195 static void ssb_pcmcia_write16(struct ssb_device *dev, u16 offset, u16 value)
197 struct ssb_bus *bus = dev->bus;
199 if (unlikely(do_select_core(bus, dev, &offset)))
201 //printk("W16 0x%04X, 0x%04X\n", offset, value);
202 writew(value, bus->mmio + offset);
205 static void ssb_pcmcia_write32(struct ssb_device *dev, u16 offset, u32 value)
207 struct ssb_bus *bus = dev->bus;
209 if (unlikely(do_select_core(bus, dev, &offset)))
211 //printk("W32 0x%04X, 0x%08X\n", offset, value);
212 readw(bus->mmio + offset);
213 writew(value >> 16, bus->mmio + offset + 2);
214 readw(bus->mmio + offset);
215 writew(value, bus->mmio + offset);
218 const struct ssb_bus_ops ssb_pcmcia_ops = {
219 .read16 = ssb_pcmcia_read16,
220 .read32 = ssb_pcmcia_read32,
221 .write16 = ssb_pcmcia_write16,
222 .write32 = ssb_pcmcia_write32,
225 int ssb_pcmcia_init(struct ssb_bus *bus)
230 if (bus->bustype != SSB_BUSTYPE_PCMCIA)
233 /* Switch segment to a known state and sync
234 * bus->mapped_pcmcia_seg with hardware state. */
235 ssb_pcmcia_switch_segment(bus, 0);
237 /* Init IRQ routing */
238 reg.Action = CS_READ;
240 if (bus->chip_id == 0x4306)
244 err = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
245 if (err != CS_SUCCESS)
247 reg.Action = CS_WRITE;
248 reg.Value |= 0x04 | 0x01;
249 err = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
250 if (err != CS_SUCCESS)