1 /**************************************************************************
3 * BRIEF MODULE DESCRIPTION
4 * PCI init for Ralink RT2880 solution
6 * Copyright 2007 Ralink Inc. (bruce_chang@ralinktech.com.tw)
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
14 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
16 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
19 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 675 Mass Ave, Cambridge, MA 02139, USA.
29 **************************************************************************
30 * May 2007 Bruce Chang
33 * May 2009 Bruce Chang
34 * support RT2880/RT3883 PCIe
36 * May 2011 Bruce Chang
37 * support RT6855/MT7620 PCIe
39 **************************************************************************
42 #include <linux/types.h>
43 #include <linux/pci.h>
44 #include <linux/kernel.h>
45 #include <linux/slab.h>
46 #include <linux/version.h>
49 #include <asm/mips-cm.h>
50 #include <linux/init.h>
51 #include <linux/module.h>
52 #include <linux/delay.h>
54 #include <linux/of_pci.h>
55 #include <linux/of_irq.h>
56 #include <linux/platform_device.h>
58 #include <ralink_regs.h>
60 extern void pcie_phy_init(void);
61 extern void chk_phy_pll(void);
64 * These functions and structures provide the BIOS scan and mapping of the PCI
68 #define RALINK_PCIE0_CLK_EN (1<<24)
69 #define RALINK_PCIE1_CLK_EN (1<<25)
70 #define RALINK_PCIE2_CLK_EN (1<<26)
72 #define RALINK_PCI_CONFIG_ADDR 0x20
73 #define RALINK_PCI_CONFIG_DATA_VIRTUAL_REG 0x24
74 #define RALINK_PCI_MEMBASE *(volatile u32 *)(RALINK_PCI_BASE + 0x0028)
75 #define RALINK_PCI_IOBASE *(volatile u32 *)(RALINK_PCI_BASE + 0x002C)
76 #define RALINK_PCIE0_RST (1<<24)
77 #define RALINK_PCIE1_RST (1<<25)
78 #define RALINK_PCIE2_RST (1<<26)
79 #define RALINK_SYSCTL_BASE 0xBE000000
81 #define RALINK_PCI_PCICFG_ADDR *(volatile u32 *)(RALINK_PCI_BASE + 0x0000)
82 #define RALINK_PCI_PCIMSK_ADDR *(volatile u32 *)(RALINK_PCI_BASE + 0x000C)
83 #define RALINK_PCI_BASE 0xBE140000
85 #define RALINK_PCIEPHY_P0P1_CTL_OFFSET (RALINK_PCI_BASE + 0x9000)
86 #define RT6855_PCIE0_OFFSET 0x2000
87 #define RT6855_PCIE1_OFFSET 0x3000
88 #define RT6855_PCIE2_OFFSET 0x4000
90 #define RALINK_PCI0_BAR0SETUP_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0010)
91 #define RALINK_PCI0_IMBASEBAR0_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0018)
92 #define RALINK_PCI0_ID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0030)
93 #define RALINK_PCI0_CLASS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0034)
94 #define RALINK_PCI0_SUBID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0038)
95 #define RALINK_PCI0_STATUS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0050)
96 #define RALINK_PCI0_DERR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0060)
97 #define RALINK_PCI0_ECRC *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0064)
99 #define RALINK_PCI1_BAR0SETUP_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0010)
100 #define RALINK_PCI1_IMBASEBAR0_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0018)
101 #define RALINK_PCI1_ID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0030)
102 #define RALINK_PCI1_CLASS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0034)
103 #define RALINK_PCI1_SUBID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0038)
104 #define RALINK_PCI1_STATUS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0050)
105 #define RALINK_PCI1_DERR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0060)
106 #define RALINK_PCI1_ECRC *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0064)
108 #define RALINK_PCI2_BAR0SETUP_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0010)
109 #define RALINK_PCI2_IMBASEBAR0_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0018)
110 #define RALINK_PCI2_ID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0030)
111 #define RALINK_PCI2_CLASS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0034)
112 #define RALINK_PCI2_SUBID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0038)
113 #define RALINK_PCI2_STATUS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0050)
114 #define RALINK_PCI2_DERR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0060)
115 #define RALINK_PCI2_ECRC *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0064)
117 #define RALINK_PCIEPHY_P0P1_CTL_OFFSET (RALINK_PCI_BASE + 0x9000)
118 #define RALINK_PCIEPHY_P2_CTL_OFFSET (RALINK_PCI_BASE + 0xA000)
121 #define MV_WRITE(ofs, data) \
122 *(volatile u32 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le32(data)
123 #define MV_READ(ofs, data) \
124 *(data) = le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
125 #define MV_READ_DATA(ofs) \
126 le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
128 #define MV_WRITE_16(ofs, data) \
129 *(volatile u16 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le16(data)
130 #define MV_READ_16(ofs, data) \
131 *(data) = le16_to_cpu(*(volatile u16 *)(RALINK_PCI_BASE+(ofs)))
133 #define MV_WRITE_8(ofs, data) \
134 *(volatile u8 *)(RALINK_PCI_BASE+(ofs)) = data
135 #define MV_READ_8(ofs, data) \
136 *(data) = *(volatile u8 *)(RALINK_PCI_BASE+(ofs))
140 #define RALINK_PCI_MM_MAP_BASE 0x60000000
141 #define RALINK_PCI_IO_MAP_BASE 0x1e160000
143 #define RALINK_SYSTEM_CONTROL_BASE 0xbe000000
145 #define ASSERT_SYSRST_PCIE(val) do { \
146 if (*(unsigned int *)(0xbe00000c) == 0x00030101) \
147 RALINK_RSTCTRL |= val; \
149 RALINK_RSTCTRL &= ~val; \
151 #define DEASSERT_SYSRST_PCIE(val) do { \
152 if (*(unsigned int *)(0xbe00000c) == 0x00030101) \
153 RALINK_RSTCTRL &= ~val; \
155 RALINK_RSTCTRL |= val; \
157 #define RALINK_SYSCFG1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x14)
158 #define RALINK_CLKCFG1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x30)
159 #define RALINK_RSTCTRL *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x34)
160 #define RALINK_GPIOMODE *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x60)
161 #define RALINK_PCIE_CLK_GEN *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x7c)
162 #define RALINK_PCIE_CLK_GEN1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x80)
163 #define PPLL_CFG1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x9c)
164 #define PPLL_DRV *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0xa0)
166 #define RALINK_PCI_HOST_MODE_EN (1<<7)
167 #define RALINK_PCIE_RC_MODE_EN (1<<8)
169 #define RALINK_PCIE_RST (1<<23)
170 #define RALINK_PCI_RST (1<<24)
172 #define RALINK_PCI_CLK_EN (1<<19)
173 #define RALINK_PCIE_CLK_EN (1<<21)
174 //RALINK_GPIOMODE bit
175 #define PCI_SLOTx2 (1<<11)
176 #define PCI_SLOTx1 (2<<11)
178 #define PDRV_SW_SET (1<<31)
179 #define LC_CKDRVPD_ (1<<19)
181 #define MEMORY_BASE 0x0
182 static int pcie_link_status
= 0;
184 #define PCI_ACCESS_READ_1 0
185 #define PCI_ACCESS_READ_2 1
186 #define PCI_ACCESS_READ_4 2
187 #define PCI_ACCESS_WRITE_1 3
188 #define PCI_ACCESS_WRITE_2 4
189 #define PCI_ACCESS_WRITE_4 5
191 static int pcie_irq
[3];
193 static int config_access(unsigned char access_type
, struct pci_bus
*bus
,
194 unsigned int devfn
, unsigned int where
, u32
* data
)
196 unsigned int slot
= PCI_SLOT(devfn
);
197 u8 func
= PCI_FUNC(devfn
);
198 uint32_t address_reg
, data_reg
;
199 unsigned int address
;
201 address_reg
= RALINK_PCI_CONFIG_ADDR
;
202 data_reg
= RALINK_PCI_CONFIG_DATA_VIRTUAL_REG
;
204 address
= (((where
&0xF00)>>8)<<24) |(bus
->number
<< 16) | (slot
<< 11) | (func
<< 8) | (where
& 0xfc) | 0x80000000;
205 MV_WRITE(address_reg
, address
);
207 switch(access_type
) {
208 case PCI_ACCESS_WRITE_1
:
209 MV_WRITE_8(data_reg
+(where
&0x3), *data
);
211 case PCI_ACCESS_WRITE_2
:
212 MV_WRITE_16(data_reg
+(where
&0x3), *data
);
214 case PCI_ACCESS_WRITE_4
:
215 MV_WRITE(data_reg
, *data
);
217 case PCI_ACCESS_READ_1
:
218 MV_READ_8( data_reg
+(where
&0x3), data
);
220 case PCI_ACCESS_READ_2
:
221 MV_READ_16(data_reg
+(where
&0x3), data
);
223 case PCI_ACCESS_READ_4
:
224 MV_READ(data_reg
, data
);
227 printk("no specify access type\n");
234 read_config_byte(struct pci_bus
*bus
, unsigned int devfn
, int where
, u8
* val
)
236 return config_access(PCI_ACCESS_READ_1
, bus
, devfn
, (unsigned int)where
, (u32
*)val
);
240 read_config_word(struct pci_bus
*bus
, unsigned int devfn
, int where
, u16
* val
)
242 return config_access(PCI_ACCESS_READ_2
, bus
, devfn
, (unsigned int)where
, (u32
*)val
);
246 read_config_dword(struct pci_bus
*bus
, unsigned int devfn
, int where
, u32
* val
)
248 return config_access(PCI_ACCESS_READ_4
, bus
, devfn
, (unsigned int)where
, (u32
*)val
);
252 write_config_byte(struct pci_bus
*bus
, unsigned int devfn
, int where
, u8 val
)
254 if (config_access(PCI_ACCESS_WRITE_1
, bus
, devfn
, (unsigned int)where
, (u32
*)&val
))
257 return PCIBIOS_SUCCESSFUL
;
261 write_config_word(struct pci_bus
*bus
, unsigned int devfn
, int where
, u16 val
)
263 if (config_access(PCI_ACCESS_WRITE_2
, bus
, devfn
, where
, (u32
*)&val
))
266 return PCIBIOS_SUCCESSFUL
;
270 write_config_dword(struct pci_bus
*bus
, unsigned int devfn
, int where
, u32 val
)
272 if (config_access(PCI_ACCESS_WRITE_4
, bus
, devfn
, where
, &val
))
275 return PCIBIOS_SUCCESSFUL
;
280 pci_config_read(struct pci_bus
*bus
, unsigned int devfn
, int where
, int size
, u32
* val
)
284 return read_config_byte(bus
, devfn
, where
, (u8
*) val
);
286 return read_config_word(bus
, devfn
, where
, (u16
*) val
);
288 return read_config_dword(bus
, devfn
, where
, val
);
293 pci_config_write(struct pci_bus
*bus
, unsigned int devfn
, int where
, int size
, u32 val
)
297 return write_config_byte(bus
, devfn
, where
, (u8
) val
);
299 return write_config_word(bus
, devfn
, where
, (u16
) val
);
301 return write_config_dword(bus
, devfn
, where
, val
);
305 struct pci_ops mt7621_pci_ops
= {
306 .read
= pci_config_read
,
307 .write
= pci_config_write
,
310 static struct resource mt7621_res_pci_mem1
;
311 static struct resource mt7621_res_pci_io1
;
313 static struct pci_controller mt7621_controller
= {
314 .pci_ops
= &mt7621_pci_ops
,
315 .mem_resource
= &mt7621_res_pci_mem1
,
316 .io_resource
= &mt7621_res_pci_io1
,
320 read_config(unsigned long bus
, unsigned long dev
, unsigned long func
, unsigned long reg
, unsigned long *val
)
322 unsigned int address_reg
, data_reg
, address
;
324 address_reg
= RALINK_PCI_CONFIG_ADDR
;
325 data_reg
= RALINK_PCI_CONFIG_DATA_VIRTUAL_REG
;
326 address
= (((reg
& 0xF00)>>8)<<24) | (bus
<< 16) | (dev
<< 11) | (func
<< 8) | (reg
& 0xfc) | 0x80000000 ;
327 MV_WRITE(address_reg
, address
);
328 MV_READ(data_reg
, val
);
333 write_config(unsigned long bus
, unsigned long dev
, unsigned long func
, unsigned long reg
, unsigned long val
)
335 unsigned int address_reg
, data_reg
, address
;
337 address_reg
= RALINK_PCI_CONFIG_ADDR
;
338 data_reg
= RALINK_PCI_CONFIG_DATA_VIRTUAL_REG
;
339 address
= (((reg
& 0xF00)>>8)<<24) | (bus
<< 16) | (dev
<< 11) | (func
<< 8) | (reg
& 0xfc) | 0x80000000 ;
340 MV_WRITE(address_reg
, address
);
341 MV_WRITE(data_reg
, val
);
347 pcibios_map_irq(const struct pci_dev
*dev
, u8 slot
, u8 pin
)
353 if (dev
->bus
->number
== 0) {
354 write_config(0, slot
, 0, PCI_BASE_ADDRESS_0
, MEMORY_BASE
);
355 read_config(0, slot
, 0, PCI_BASE_ADDRESS_0
, (unsigned long *)&val
);
356 printk("BAR0 at slot %d = %x\n", slot
, val
);
359 pci_write_config_byte(dev
, PCI_CACHE_LINE_SIZE
, 0x14); //configure cache line size 0x14
360 pci_write_config_byte(dev
, PCI_LATENCY_TIMER
, 0xFF); //configure latency timer 0x10
361 pci_read_config_word(dev
, PCI_COMMAND
, &cmd
);
362 cmd
= cmd
| PCI_COMMAND_MASTER
| PCI_COMMAND_IO
| PCI_COMMAND_MEMORY
;
363 pci_write_config_word(dev
, PCI_COMMAND
, cmd
);
365 irq
= of_irq_parse_and_map_pci(dev
, slot
, pin
);
367 pci_write_config_byte(dev
, PCI_INTERRUPT_LINE
, irq
);
372 set_pcie_phy(u32
*addr
, int start_b
, int bits
, int val
)
374 // printk("0x%p:", addr);
375 // printk(" %x", *addr);
376 *(unsigned int *)(addr
) &= ~(((1<<bits
) - 1)<<start_b
);
377 *(unsigned int *)(addr
) |= val
<< start_b
;
378 // printk(" -> %x\n", *addr);
382 bypass_pipe_rst(void)
385 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x02c), 12, 1, 0x01); // rg_pe1_pipe_rst_b
386 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x02c), 4, 1, 0x01); // rg_pe1_pipe_cmd_frc[4]
388 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x12c), 12, 1, 0x01); // rg_pe1_pipe_rst_b
389 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x12c), 4, 1, 0x01); // rg_pe1_pipe_cmd_frc[4]
391 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x02c), 12, 1, 0x01); // rg_pe1_pipe_rst_b
392 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x02c), 4, 1, 0x01); // rg_pe1_pipe_cmd_frc[4]
396 set_phy_for_ssc(void)
398 unsigned long reg
= (*(volatile u32
*)(RALINK_SYSCTL_BASE
+ 0x10));
400 reg
= (reg
>> 6) & 0x7;
401 /* Set PCIe Port0 & Port1 PHY to disable SSC */
402 /* Debug Xtal Type */
403 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x400), 8, 1, 0x01); // rg_pe1_frc_h_xtal_type
404 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x400), 9, 2, 0x00); // rg_pe1_h_xtal_type
405 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x000), 4, 1, 0x01); // rg_pe1_frc_phy_en //Force Port 0 enable control
406 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x100), 4, 1, 0x01); // rg_pe1_frc_phy_en //Force Port 1 enable control
407 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x000), 5, 1, 0x00); // rg_pe1_phy_en //Port 0 disable
408 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x100), 5, 1, 0x00); // rg_pe1_phy_en //Port 1 disable
409 if(reg
<= 5 && reg
>= 3) { // 40MHz Xtal
410 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 6, 2, 0x01); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
411 printk("***** Xtal 40MHz *****\n");
412 } else { // 25MHz | 20MHz Xtal
413 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 6, 2, 0x00); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
415 printk("***** Xtal 25MHz *****\n");
416 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4bc), 4, 2, 0x01); // RG_PE1_H_PLL_FBKSEL //Feedback clock select
417 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x49c), 0,31, 0x18000000); // RG_PE1_H_LCDDS_PCW_NCPO //DDS NCPO PCW (for host mode)
418 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4a4), 0,16, 0x18d); // RG_PE1_H_LCDDS_SSC_PRD //DDS SSC dither period control
419 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4a8), 0,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA //DDS SSC dither amplitude control
420 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4a8), 16,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA1 //DDS SSC dither amplitude control for initial
422 printk("***** Xtal 20MHz *****\n");
425 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4a0), 5, 1, 0x01); // RG_PE1_LCDDS_CLK_PH_INV //DDS clock inversion
426 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 22, 2, 0x02); // RG_PE1_H_PLL_BC
427 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 18, 4, 0x06); // RG_PE1_H_PLL_BP
428 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 12, 4, 0x02); // RG_PE1_H_PLL_IR
429 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 8, 4, 0x01); // RG_PE1_H_PLL_IC
430 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x4ac), 16, 3, 0x00); // RG_PE1_H_PLL_BR
431 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x490), 1, 3, 0x02); // RG_PE1_PLL_DIVEN
432 if(reg
<= 5 && reg
>= 3) { // 40MHz Xtal
433 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x414), 6, 2, 0x01); // rg_pe1_mstckdiv //value of da_pe1_mstckdiv when force mode enable
434 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x414), 5, 1, 0x01); // rg_pe1_frc_mstckdiv //force mode enable of da_pe1_mstckdiv
436 /* Enable PHY and disable force mode */
437 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x000), 5, 1, 0x01); // rg_pe1_phy_en //Port 0 enable
438 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x100), 5, 1, 0x01); // rg_pe1_phy_en //Port 1 enable
439 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x000), 4, 1, 0x00); // rg_pe1_frc_phy_en //Force Port 0 disable control
440 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P0P1_CTL_OFFSET
+ 0x100), 4, 1, 0x00); // rg_pe1_frc_phy_en //Force Port 1 disable control
442 /* Set PCIe Port2 PHY to disable SSC */
443 /* Debug Xtal Type */
444 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x400), 8, 1, 0x01); // rg_pe1_frc_h_xtal_type
445 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x400), 9, 2, 0x00); // rg_pe1_h_xtal_type
446 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x000), 4, 1, 0x01); // rg_pe1_frc_phy_en //Force Port 0 enable control
447 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x000), 5, 1, 0x00); // rg_pe1_phy_en //Port 0 disable
448 if(reg
<= 5 && reg
>= 3) { // 40MHz Xtal
449 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 6, 2, 0x01); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
450 } else { // 25MHz | 20MHz Xtal
451 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 6, 2, 0x00); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
452 if (reg
>= 6) { // 25MHz Xtal
453 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4bc), 4, 2, 0x01); // RG_PE1_H_PLL_FBKSEL //Feedback clock select
454 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x49c), 0,31, 0x18000000); // RG_PE1_H_LCDDS_PCW_NCPO //DDS NCPO PCW (for host mode)
455 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4a4), 0,16, 0x18d); // RG_PE1_H_LCDDS_SSC_PRD //DDS SSC dither period control
456 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4a8), 0,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA //DDS SSC dither amplitude control
457 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4a8), 16,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA1 //DDS SSC dither amplitude control for initial
460 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4a0), 5, 1, 0x01); // RG_PE1_LCDDS_CLK_PH_INV //DDS clock inversion
461 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 22, 2, 0x02); // RG_PE1_H_PLL_BC
462 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 18, 4, 0x06); // RG_PE1_H_PLL_BP
463 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 12, 4, 0x02); // RG_PE1_H_PLL_IR
464 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 8, 4, 0x01); // RG_PE1_H_PLL_IC
465 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x4ac), 16, 3, 0x00); // RG_PE1_H_PLL_BR
466 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x490), 1, 3, 0x02); // RG_PE1_PLL_DIVEN
467 if(reg
<= 5 && reg
>= 3) { // 40MHz Xtal
468 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x414), 6, 2, 0x01); // rg_pe1_mstckdiv //value of da_pe1_mstckdiv when force mode enable
469 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x414), 5, 1, 0x01); // rg_pe1_frc_mstckdiv //force mode enable of da_pe1_mstckdiv
471 /* Enable PHY and disable force mode */
472 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x000), 5, 1, 0x01); // rg_pe1_phy_en //Port 0 enable
473 set_pcie_phy((u32
*)(RALINK_PCIEPHY_P2_CTL_OFFSET
+ 0x000), 4, 1, 0x00); // rg_pe1_frc_phy_en //Force Port 0 disable control
476 void setup_cm_memory_region(struct resource
*mem_resource
)
478 resource_size_t mask
;
479 if (mips_cps_numiocu(0)) {
480 /* FIXME: hardware doesn't accept mask values with 1s after
481 0s (e.g. 0xffef), so it would be great to warn if that's
483 mask
= ~(mem_resource
->end
- mem_resource
->start
);
485 write_gcr_reg1_base(mem_resource
->start
);
486 write_gcr_reg1_mask(mask
| CM_GCR_REGn_MASK_CMTGT_IOCU0
);
487 printk("PCI coherence region base: 0x%08lx, mask/settings: 0x%08lx\n",
488 read_gcr_reg1_base(),
489 read_gcr_reg1_mask());
493 static int mt7621_pci_probe(struct platform_device
*pdev
)
495 unsigned long val
= 0;
498 for (i
= 0; i
< 3; i
++)
499 pcie_irq
[i
] = irq_of_parse_and_map(pdev
->dev
.of_node
, i
);
501 iomem_resource
.start
= 0;
502 iomem_resource
.end
= ~0;
503 ioport_resource
.start
= 0;
504 ioport_resource
.end
= ~0;
506 val
= RALINK_PCIE0_RST
;
507 val
|= RALINK_PCIE1_RST
;
508 val
|= RALINK_PCIE2_RST
;
510 ASSERT_SYSRST_PCIE(RALINK_PCIE0_RST
| RALINK_PCIE1_RST
| RALINK_PCIE2_RST
);
511 printk("pull PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL
);
513 *(unsigned int *)(0xbe000060) &= ~(0x3<<10 | 0x3<<3);
514 *(unsigned int *)(0xbe000060) |= 0x1<<10 | 0x1<<3;
516 *(unsigned int *)(0xbe000600) |= 0x1<<19 | 0x1<<8 | 0x1<<7; // use GPIO19/GPIO8/GPIO7 (PERST_N/UART_RXD3/UART_TXD3)
518 *(unsigned int *)(0xbe000620) &= ~(0x1<<19 | 0x1<<8 | 0x1<<7); // clear DATA
522 val
= RALINK_PCIE0_RST
;
523 val
|= RALINK_PCIE1_RST
;
524 val
|= RALINK_PCIE2_RST
;
526 DEASSERT_SYSRST_PCIE(val
);
527 printk("release PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL
);
529 if ((*(unsigned int *)(0xbe00000c)&0xFFFF) == 0x0101) // MT7621 E2
532 printk("release PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL
);
534 read_config(0, 0, 0, 0x70c, &val
);
535 printk("Port 0 N_FTS = %x\n", (unsigned int)val
);
536 read_config(0, 1, 0, 0x70c, &val
);
537 printk("Port 1 N_FTS = %x\n", (unsigned int)val
);
538 read_config(0, 2, 0, 0x70c, &val
);
539 printk("Port 2 N_FTS = %x\n", (unsigned int)val
);
541 RALINK_RSTCTRL
= (RALINK_RSTCTRL
| RALINK_PCIE_RST
);
542 RALINK_SYSCFG1
&= ~(0x30);
543 RALINK_SYSCFG1
|= (2<<4);
544 RALINK_PCIE_CLK_GEN
&= 0x7fffffff;
545 RALINK_PCIE_CLK_GEN1
&= 0x80ffffff;
546 RALINK_PCIE_CLK_GEN1
|= 0xa << 24;
547 RALINK_PCIE_CLK_GEN
|= 0x80000000;
549 RALINK_RSTCTRL
= (RALINK_RSTCTRL
& ~RALINK_PCIE_RST
);
551 /* Use GPIO control instead of PERST_N */
552 *(unsigned int *)(0xbe000620) |= 0x1<<19 | 0x1<<8 | 0x1<<7; // set DATA
555 if(( RALINK_PCI0_STATUS
& 0x1) == 0)
557 printk("PCIE0 no card, disable it(RST&CLK)\n");
558 ASSERT_SYSRST_PCIE(RALINK_PCIE0_RST
);
559 RALINK_CLKCFG1
= (RALINK_CLKCFG1
& ~RALINK_PCIE0_CLK_EN
);
560 pcie_link_status
&= ~(1<<0);
562 pcie_link_status
|= 1<<0;
563 RALINK_PCI_PCIMSK_ADDR
|= (1<<20); // enable pcie1 interrupt
565 if(( RALINK_PCI1_STATUS
& 0x1) == 0)
567 printk("PCIE1 no card, disable it(RST&CLK)\n");
568 ASSERT_SYSRST_PCIE(RALINK_PCIE1_RST
);
569 RALINK_CLKCFG1
= (RALINK_CLKCFG1
& ~RALINK_PCIE1_CLK_EN
);
570 pcie_link_status
&= ~(1<<1);
572 pcie_link_status
|= 1<<1;
573 RALINK_PCI_PCIMSK_ADDR
|= (1<<21); // enable pcie1 interrupt
575 if (( RALINK_PCI2_STATUS
& 0x1) == 0) {
576 printk("PCIE2 no card, disable it(RST&CLK)\n");
577 ASSERT_SYSRST_PCIE(RALINK_PCIE2_RST
);
578 RALINK_CLKCFG1
= (RALINK_CLKCFG1
& ~RALINK_PCIE2_CLK_EN
);
579 pcie_link_status
&= ~(1<<2);
581 pcie_link_status
|= 1<<2;
582 RALINK_PCI_PCIMSK_ADDR
|= (1<<22); // enable pcie2 interrupt
584 if (pcie_link_status
== 0)
588 pcie(2/1/0) link status pcie2_num pcie1_num pcie0_num
598 switch(pcie_link_status
) {
600 RALINK_PCI_PCICFG_ADDR
&= ~0x00ff0000;
601 RALINK_PCI_PCICFG_ADDR
|= 0x1 << 16; //port0
602 RALINK_PCI_PCICFG_ADDR
|= 0x0 << 20; //port1
605 RALINK_PCI_PCICFG_ADDR
&= ~0x0fff0000;
606 RALINK_PCI_PCICFG_ADDR
|= 0x1 << 16; //port0
607 RALINK_PCI_PCICFG_ADDR
|= 0x2 << 20; //port1
608 RALINK_PCI_PCICFG_ADDR
|= 0x0 << 24; //port2
611 RALINK_PCI_PCICFG_ADDR
&= ~0x0fff0000;
612 RALINK_PCI_PCICFG_ADDR
|= 0x0 << 16; //port0
613 RALINK_PCI_PCICFG_ADDR
|= 0x2 << 20; //port1
614 RALINK_PCI_PCICFG_ADDR
|= 0x1 << 24; //port2
617 RALINK_PCI_PCICFG_ADDR
&= ~0x0fff0000;
618 RALINK_PCI_PCICFG_ADDR
|= 0x2 << 16; //port0
619 RALINK_PCI_PCICFG_ADDR
|= 0x0 << 20; //port1
620 RALINK_PCI_PCICFG_ADDR
|= 0x1 << 24; //port2
623 printk(" -> %x\n", RALINK_PCI_PCICFG_ADDR
);
624 //printk(" RALINK_PCI_ARBCTL = %x\n", RALINK_PCI_ARBCTL);
627 ioport_resource.start = mt7621_res_pci_io1.start;
628 ioport_resource.end = mt7621_res_pci_io1.end;
631 RALINK_PCI_MEMBASE
= 0xffffffff; //RALINK_PCI_MM_MAP_BASE;
632 RALINK_PCI_IOBASE
= RALINK_PCI_IO_MAP_BASE
;
635 if((pcie_link_status
& 0x1) != 0) {
636 RALINK_PCI0_BAR0SETUP_ADDR
= 0x7FFF0001; //open 7FFF:2G; ENABLE
637 RALINK_PCI0_IMBASEBAR0_ADDR
= MEMORY_BASE
;
638 RALINK_PCI0_CLASS
= 0x06040001;
639 printk("PCIE0 enabled\n");
642 if ((pcie_link_status
& 0x2) != 0) {
643 RALINK_PCI1_BAR0SETUP_ADDR
= 0x7FFF0001; //open 7FFF:2G; ENABLE
644 RALINK_PCI1_IMBASEBAR0_ADDR
= MEMORY_BASE
;
645 RALINK_PCI1_CLASS
= 0x06040001;
646 printk("PCIE1 enabled\n");
649 if ((pcie_link_status
& 0x4) != 0) {
650 RALINK_PCI2_BAR0SETUP_ADDR
= 0x7FFF0001; //open 7FFF:2G; ENABLE
651 RALINK_PCI2_IMBASEBAR0_ADDR
= MEMORY_BASE
;
652 RALINK_PCI2_CLASS
= 0x06040001;
653 printk("PCIE2 enabled\n");
656 switch(pcie_link_status
) {
658 read_config(0, 2, 0, 0x4, &val
);
659 write_config(0, 2, 0, 0x4, val
|0x4);
660 // write_config(0, 1, 0, 0x4, val|0x7);
661 read_config(0, 2, 0, 0x70c, &val
);
664 write_config(0, 2, 0, 0x70c, val
);
668 read_config(0, 1, 0, 0x4, &val
);
669 write_config(0, 1, 0, 0x4, val
|0x4);
670 // write_config(0, 1, 0, 0x4, val|0x7);
671 read_config(0, 1, 0, 0x70c, &val
);
674 write_config(0, 1, 0, 0x70c, val
);
676 read_config(0, 0, 0, 0x4, &val
);
677 write_config(0, 0, 0, 0x4, val
|0x4); //bus master enable
678 // write_config(0, 0, 0, 0x4, val|0x7); //bus master enable
679 read_config(0, 0, 0, 0x70c, &val
);
682 write_config(0, 0, 0, 0x70c, val
);
685 pci_load_of_ranges(&mt7621_controller
, pdev
->dev
.of_node
);
686 setup_cm_memory_region(mt7621_controller
.mem_resource
);
687 register_pci_controller(&mt7621_controller
);
692 int pcibios_plat_dev_init(struct pci_dev
*dev
)
697 static const struct of_device_id mt7621_pci_ids
[] = {
698 { .compatible
= "mediatek,mt7621-pci" },
701 MODULE_DEVICE_TABLE(of
, mt7621_pci_ids
);
703 static struct platform_driver mt7621_pci_driver
= {
704 .probe
= mt7621_pci_probe
,
706 .name
= "mt7621-pci",
707 .of_match_table
= of_match_ptr(mt7621_pci_ids
),
711 static int __init
mt7621_pci_init(void)
713 return platform_driver_register(&mt7621_pci_driver
);
716 arch_initcall(mt7621_pci_init
);