diff options
| author | Philippe Langlais <philippe.langlais@linaro.org> | 2011-04-18 17:14:55 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@stericsson.com> | 2011-09-19 15:14:50 +0200 |
| commit | 34f41f0d78c1f1a6b3fef48cc9ba80a8aa8d43ec (patch) | |
| tree | 39d595e95f6f2e62b8b98316c982ab8afc5c14fd /include/net | |
| parent | c942ae0c10388022d7851740dab74223260191c3 (diff) | |
caif: Add CAIF HSI Link Layer & porting on 2.6.38
Change-Id: I001c4470c26833d1f53af1eb31cb669d3424e60a
Signed-off-by: Pawel Szyszuk <pawel.szyszuk@stericsson.com>
Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/caif/caif_hsi.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/include/net/caif/caif_hsi.h b/include/net/caif/caif_hsi.h new file mode 100644 index 00000000000..6ea0d63507d --- /dev/null +++ b/include/net/caif/caif_hsi.h @@ -0,0 +1,103 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Author: Daniel Martensson <Daniel.Martensson@stericsson.com> + * License terms: GNU General Public License (GPL) version 2 + */ + +#ifndef CAIF_HSI_H_ +#define CAIF_HSI_H_ + +#include <net/caif/caif_layer.h> +#include <net/caif/caif_device.h> + +/* + * Maximum number of CAIF frames that can reside in the same HSI frame. + */ +#define CFHSI_MAX_PKTS 15 + +/* + * Maximum number of bytes used for the frame that can be embedded in the + * HSI descriptor. + */ +#define CFHSI_MAX_EMB_FRM_SZ 96 + +/* + * Decides if HSI buffers should be prefilled with 0xFF pattern for easier + * debugging. Both TX and RX buffers will be filled before the transfer. + */ +#define CFHSI_DBG_PREFILL 0 + +/* Structure describing a HSI packet descriptor. */ +struct cfhsi_desc { + u8 header; + u8 offset; + u16 cffrm_len[CFHSI_MAX_PKTS]; + u8 emb_frm[CFHSI_MAX_EMB_FRM_SZ]; +} __packed; + +/* Size of the complete HSI packet descriptor. */ +#define CFHSI_DESC_SZ (sizeof(struct cfhsi_desc)) + +/* + * Size of the complete HSI packet descriptor excluding the optional embedded + * CAIF frame. + */ +#define CFHSI_DESC_SHORT_SZ (CFHSI_DESC_SZ - CFHSI_MAX_EMB_FRM_SZ) + +/* + * Maximum bytes transferred in one transfer. + */ +/* TODO: 4096 is temporary... */ +#define CFHSI_MAX_PAYLOAD_SZ (CFHSI_MAX_PKTS * 4096) + +/* Size of the complete HSI TX buffer. */ +#define CFHSI_BUF_SZ_TX (CFHSI_DESC_SZ + CFHSI_MAX_PAYLOAD_SZ) + +/* Size of the complete HSI RX buffer. */ +#define CFHSI_BUF_SZ_RX ((2 * CFHSI_DESC_SZ) + CFHSI_MAX_PAYLOAD_SZ) + +/* Bitmasks for the HSI descriptor. */ +#define CFHSI_PIGGY_DESC (0x01 << 7) + +#define CFHSI_TX_STATE_IDLE 0 +#define CFHSI_TX_STATE_XFER 1 + +#define CFHSI_RX_STATE_DESC 0 +#define CFHSI_RX_STATE_PAYLOAD 1 + +/* Structure implemented by the CAIF HSI driver. */ +struct cfhsi_drv { + void (*tx_done_cb) (struct cfhsi_drv *drv); + void (*rx_done_cb) (struct cfhsi_drv *drv); +}; + +/* Structure implemented by HSI device. */ +struct cfhsi_dev { + int (*cfhsi_tx) (u8 *ptr, int len, struct cfhsi_dev *dev); + int (*cfhsi_rx) (u8 *ptr, int len, struct cfhsi_dev *dev); + struct cfhsi_drv *drv; +}; + +/* Structure implemented by CAIF HSI drivers. */ +struct cfhsi { + struct caif_dev_common cfdev; + struct net_device *ndev; + struct platform_device *pdev; + struct sk_buff_head qhead; + struct cfhsi_drv drv; + struct cfhsi_dev *dev; + int tx_state; + int rx_state; + u8 *tx_buf; + u8 *rx_buf; + spinlock_t lock; + int flow_off_sent; + u32 q_low_mark; + u32 q_high_mark; + bool flow_stop; + struct list_head list; +}; + +extern struct platform_driver cfhsi_driver; + +#endif /* CAIF_HSI_H_ */ |