/* * drivers/serial/mpsc.h * * Author: Mark A. Greer <mgreer@mvista.com> * * 2004 (c) MontaVista, Software, Inc. This file is licensed under * the terms of the GNU General Public License version 2. This program * is licensed "as is" without any warranty of any kind, whether express * or implied. */ #ifndef __MPSC_H__ #define __MPSC_H__ #include <linux/config.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/ioport.h> #include <linux/init.h> #include <linux/console.h> #include <linux/sysrq.h> #include <linux/serial.h> #include <linux/serial_core.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/dma-mapping.h> #include <linux/mv643xx.h> #include <asm/io.h> #include <asm/irq.h> #if defined(CONFIG_SERIAL_MPSC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) #define SUPPORT_SYSRQ #endif #define MPSC_NUM_CTLRS 2 /* * Descriptors and buffers must be cache line aligned. * Buffers lengths must be multiple of cache line size. * Number of Tx & Rx descriptors must be powers of 2. */ #define MPSC_RXR_ENTRIES 32 #define MPSC_RXRE_SIZE dma_get_cache_alignment() #define MPSC_RXR_SIZE (MPSC_RXR_ENTRIES * MPSC_RXRE_SIZE) #define MPSC_RXBE_SIZE dma_get_cache_alignment() #define MPSC_RXB_SIZE (MPSC_RXR_ENTRIES * MPSC_RXBE_SIZE) #define MPSC_TXR_ENTRIES 32 #define MPSC_TXRE_SIZE dma_get_cache_alignment() #define MPSC_TXR_SIZE (MPSC_TXR_ENTRIES * MPSC_TXRE_SIZE) #define MPSC_TXBE_SIZE dma_get_cache_alignment() #define MPSC_TXB_SIZE (MPSC_TXR_ENTRIES * MPSC_TXBE_SIZE) #define MPSC_DMA_ALLOC_SIZE (MPSC_RXR_SIZE + MPSC_RXB_SIZE + \ MPSC_TXR_SIZE + MPSC_TXB_SIZE + \ dma_get_cache_alignment() /* for alignment */) /* Rx and Tx Ring entry descriptors -- assume entry size is <= cacheline size */ struct mpsc_rx_desc { u16 bufsize; u16 bytecnt; u32 cmdstat; u32 link; u32 buf_ptr; } __attribute((packed)); struct mpsc_tx_desc { u16 bytecnt; u16 shadow; u32 cmdstat; u32 link; u32 buf_ptr; } __attribute((packed)); /* * Some regs that have the erratum that you can't read them are are shared * between the two MPSC controllers. This struct contains those shared regs. */ struct mpsc_shared_regs { phys_addr_t mpsc_routing_base_p; phys_addr_t sdma_intr_base_p; void __iomem *mpsc_routing_base; void __iomem *sdma_intr_base; u32 MPSC_MRR_m; u32 MPSC_RCRR_m; u32 MPSC_TCRR_m; u32 SDMA_INTR_CAUSE_m; u32 SDMA_INTR_MASK_m; }; /* The main driver data structure */ struct mpsc_port_info { struct uart_port port; /* Overlay uart_port structure */ /* Internal driver state for this ctlr */ u8 ready; u8 rcv_data; tcflag_t c_iflag; /* save termios->c_iflag */ tcflag_t c_cflag; /* save termios->c_cflag */ /* Info passed in from platform */ u8 mirror_regs; /* Need to mirror regs? */ u8 cache_mgmt; /* Need manual cache mgmt? */ u8 brg_can_tune; /* BRG has baud tuning? */ u32 brg_clk_src; u16 mpsc_max_idle; int default_baud; int default_bits; int default_parity; int default_flow; /* Physical addresses of various blocks of registers (from platform) */ phys_addr_t mpsc_base_p; phys_addr_t sdma_base_p; phys_addr_t brg_base_p; /* Virtual addresses of various blocks of registers (from platform) */ void __iomem *mpsc_base; void __iomem *sdma_base; void __iomem *brg_base; /* Descriptor ring and buffer allocations */ void *dma_region; dma_addr_t dma_region_p; dma_addr_t rxr; /* Rx descriptor ring */ dma_addr_t rxr_p; /* Phys addr of rxr */ u8 *rxb; /* Rx Ring I/O buf */ u8 *rxb_p; /* Phys addr of rxb */ u32 rxr_posn; /* First desc w/ Rx data */ dma_addr_t txr; /* Tx descriptor ring */ dma_addr_t txr_p; /* Phys addr of txr */ u8 *txb; /* Tx Ring I/O buf */ u8 *txb_p; /* Phys addr of txb */ int txr_head; /* Where new data goes */ int txr_tail; /* Where sent data comes off */ /* Mirrored values of regs we can't read (if 'mirror_regs' set) */ u32 MPSC_MPCR_m; u32 MPSC_CHR_1_m; u32 MPSC_CHR_2_m; u32 MPSC_CHR_10_m; u32 BRG_BCR_m; struct mpsc_shared_regs *shared_regs; }; /* Hooks to platform-specific code */ int mpsc_platform_register_driver(void); void mpsc_platform_unregister_driver(void); /* Hooks back in to mpsc common to be called by platform-specific code */ struct mpsc_port_info *mpsc_device_probe(int index); struct mpsc_port_info *mpsc_device_remove(int index); /* ***************************************************************************** * * Multi-Protocol Serial Controller Interface Registers * ***************************************************************************** */ /* Main Configuratino Register Offsets */ #define MPSC_MMCRL 0x0000 #define MPSC_MMCRH 0x0004 #define MPSC_MPCR 0x0008 #define MPSC_CHR_1 0x000c #define MPSC_CHR_2 0x0010 #define MPSC_CHR_3 0x0014 #define MPSC_CHR_4 0x0018 #define MPSC_CHR_5 0x001c #define MPSC_CHR_6 0x0020 #define MPSC_CHR_7 0x0024 #define MPSC_CHR_8 0x0028 #define MPSC_CHR_9 0x002c #define MPSC_CHR_10 0x0030 #define MPSC_CHR_11 0x0034 #define MPSC_MPCR_FRZ (1 << 9) #define MPSC_MPCR_CL_5 0 #define MPSC_MPCR_CL_6 1 #define MPSC_MPCR_CL_7 2 #define MPSC_MPCR_CL_8 3 #define MPSC_MPCR_SBL_1 0 #define MPSC_MPCR_SBL_2 1 #define MPSC_CHR_2_TEV (1<<1) #define MPSC_CHR_2_TA (1<<7) #define MPSC_CHR_2_TTCS (1<<9) #define MPSC_CHR_2_REV (1<<17) #define MPSC_CHR_2_RA (1<<23) #define MPSC_CHR_2_CRD (1<<25) #define MPSC_CHR_2_EH (1<<31) #define MPSC_CHR_2_PAR_ODD 0 #define MPSC_CHR_2_PAR_SPACE 1 #define MPSC_CHR_2_PAR_EVEN 2 #define MPSC_CHR_2_PAR_MARK 3 /* MPSC Signal Routing */ #define MPSC_MRR 0x0000 #define MPSC_RCRR 0x0004 #define MPSC_TCRR 0x0008 /* ***************************************************************************** * * Serial DMA Controller Interface Registers * ***************************************************************************** */ #define SDMA_SDC 0x0000 #define SDMA_SDCM 0x0008 #define SDMA_RX_DESC 0x0800 #define SDMA_RX_BUF_PTR 0x0808 #define SDMA_SCRDP 0x0810 #define SDMA_TX_DESC 0x0c00 #define SDMA_SCTDP 0x0c10 #define SDMA_SFTDP 0x0c14 #define SDMA_DESC_CMDSTAT_PE (1<<0) #define SDMA_DESC_CMDSTAT_CDL (1<<1) #define SDMA_DESC_CMDSTAT_FR (1<<3) #define SDMA_DESC_CMDSTAT_OR (1<<6) #define SDMA_DESC_CMDSTAT_BR (1<<9) #define SDMA_DESC_CMDSTAT_MI (1<<10) #define SDMA_DESC_CMDSTAT_A (1<<11) #define SDMA_DESC_CMDSTAT_AM (1<<12) #define SDMA_DESC_CMDSTAT_CT (1<<13) #define SDMA_DESC_CMDSTAT_C (1<<14) #define SDMA_DESC_CMDSTAT_ES (1<<15) #define SDMA_DESC_CMDSTAT_L (1<<16) #define SDMA_DESC_CMDSTAT_F (1<<17) #define SDMA_DESC_CMDSTAT_P (1<<18) #define SDMA_DESC_CMDSTAT_EI (1<<23) #define SDMA_DESC_CMDSTAT_O (1<<31) #define SDMA_DESC_DFLT (SDMA_DESC_CMDSTAT_O | \ SDMA_DESC_CMDSTAT_EI) #define SDMA_SDC_RFT (1<<0) #define SDMA_SDC_SFM (1<<1) #define SDMA_SDC_BLMR (1<<6) #define SDMA_SDC_BLMT (1<<7) #define SDMA_SDC_POVR (1<<8) #define SDMA_SDC_RIFB (1<<9) #define SDMA_SDCM_ERD (1<<7) #define SDMA_SDCM_AR (1<<15) #define SDMA_SDCM_STD (1<<16) #define SDMA_SDCM_TXD (1<<23) #define SDMA_SDCM_AT (1<<31) #define SDMA_0_CAUSE_RXBUF (1<<0) #define SDMA_0_CAUSE_RXERR (1<<1) #define SDMA_0_CAUSE_TXBUF (1<<2) #define SDMA_0_CAUSE_TXEND (1<<3) #define SDMA_1_CAUSE_RXBUF (1<<8) #define SDMA_1_CAUSE_RXERR (1<<9) #define SDMA_1_CAUSE_TXBUF (1<<10) #define SDMA_1_CAUSE_TXEND (1<<11) #define SDMA_CAUSE_RX_MASK (SDMA_0_CAUSE_RXBUF | SDMA_0_CAUSE_RXERR | \ SDMA_1_CAUSE_RXBUF | SDMA_1_CAUSE_RXERR) #define SDMA_CAUSE_TX_MASK (SDMA_0_CAUSE_TXBUF | SDMA_0_CAUSE_TXEND | \ SDMA_1_CAUSE_TXBUF | SDMA_1_CAUSE_TXEND) /* SDMA Interrupt registers */ #define SDMA_INTR_CAUSE 0x0000 #define SDMA_INTR_MASK 0x0080 /* ***************************************************************************** * * Baud Rate Generator Interface Registers * ***************************************************************************** */ #define BRG_BCR 0x0000 #define BRG_BTR 0x0004 #endif /* __MPSC_H__ */